Remove unused icons and fix "Glyph bbox was incorrect" FF warnings

The "Glyph bbox was incorrect" is a Firefox warning about
incorrect bounding box values in the font. The icon font, including
the incorrect bounding box values is generatedby icomoon.
I ran the TTF file through fontsquirrel and that seems to have
fixed the issue.

More about this warning: https://bugzilla.mozilla.org/show_bug.cgi?id=1847959

static/css/icomoon.css

@@ -1,9 +1,9 @@
 @font-face {
   font-family: 'icomoon';
   src:
-    url('../fonts/icomoon.ttf?fw1vj7') format('truetype'),
-    url('../fonts/icomoon.woff?fw1vj7') format('woff'),
-    url('../fonts/icomoon.svg?fw1vj7#icomoon') format('svg');
+    url('../fonts/icomoon.ttf?l2mf5g') format('truetype'),
+    url('../fonts/icomoon.woff?l2mf5g') format('woff'),
+    url('../fonts/icomoon.svg?ra7l2mf5g8ae#icomoon') format('svg');
   font-weight: normal;
   font-style: normal;
   font-display: block;
@@ -125,7 +125,7 @@
 }
 .ic-msteams:after {
   content: "\e924";
-  margin-left: -1.056640625em;
+  margin-left: -1em;
   color: rgb(78, 86, 190);
 }
 .ic-msteamsw:before {
@@ -134,7 +134,7 @@
 }
 .ic-msteamsw:after {
   content: "\e924";
-  margin-left: -1.056640625em;
+  margin-left: -1em;
   color: rgb(78, 86, 190);
 }
 .ic-opsgenie:after {
@@ -152,9 +152,6 @@
 .ic-matrix:after {
   content: "\e901";
 }
-.ic-started:before {
-  content: "\e038";
-}
 .ic-pagertree:before {
   content: "\e90d";
   color: rgb(255, 255, 255);
@@ -243,12 +240,6 @@
   content: "\e903";
   color: #25d366;
 }
-.ic-clippy:before {
-  content: "\e912";
-}
-.ic-cancel:before {
-  content: "\e5c9";
-}
 .ic-up:before {
   content: "\e86c";
 }
@@ -288,3 +279,6 @@
 .ic-timer:before {
   content: "\e425";
 }
+.ic-clippy:before {
+  content: "\e912";
+}

static/fonts/icomoon.svg

@@ -18,7 +18,6 @@
 <glyph unicode="&#xe7f6;" glyph-name="paused" d="M768 312.667l-382 402c10 4 20 10 30 14h2l12 6c6 2 12 2 18 4v30c0 36 28 64 64 64s64-28 64-64v-30c122-30 192-138 192-270v-156zM512 0.667c-48 0-86 36-86 84h172c0-48-38-84-86-84zM334 676.667c187.235-193.432 375.34-385.994 562-580l-54-54-86 86h-586v42l86 86v214c0 54 12 104 34 146l-120 118 54 56z" />
 <glyph unicode="&#xe7f7;" glyph-name="down" d="M512 0.667c-48 0-86 38-86 84h170c0-49.675-37.225-84-84-84zM768 468.667v-212l86-86v-42h-684v42l86 86v212c0 132 70 240 192 270v30c0 36 28 64 64 64s64-28 64-64v-30c122-30 192-140 192-270zM852 490.667c-6 114-64 212-150 274l60 60c102-78 170-198 176-334h-86zM324 764.667c-88-62-146-160-152-274h-86c6 136 74 256 176 334z" />
 <glyph unicode="&#xe86c;" glyph-name="up, new, ok" d="M426 212.667l384 384-60 62-324-324-152 152-60-60zM512 852.667c236 0 426-190 426-426s-190-426-426-426-426 190-426 426 190 426 426 426z" />
-<glyph unicode="&#xe8b5;" glyph-name="schedule" d="M534 640.667v-224l192-114-32-54-224 136v256h64zM512 84.667c188 0 342 154 342 342s-154 342-342 342-342-154-342-342 154-342 342-342zM512 852.667c236 0 426-190 426-426s-190-426-426-426-426 190-426 426 190 426 426 426z" />
 <glyph unicode="&#xe900;" d="M986.025 426.667c0-261.797-212.228-474.025-474.025-474.025s-474.025 212.228-474.025 474.025c0 261.797 212.228 474.025 474.025 474.025s474.025-212.228 474.025-474.025z" />
 <glyph unicode="&#xe901;" glyph-name="matrix" d="M563.922 550.948q22.169 33.905 52.488 51.509 30.645 17.931 67.158 17.931 62.92 0 95.847-38.796t32.927-112.799v-222.338h-117.364v190.389q0.327 4.238 0.327 8.802 0.327 4.564 0.327 13.041 0 38.795-11.41 56.074-11.41 17.604-36.839 17.604-33.253 0-51.51-27.385-17.931-27.385-18.583-79.22v-179.305h-117.364v190.389q0 60.638-10.432 77.917-10.432 17.604-37.165 17.604-33.579 0-51.836-27.711-18.257-27.385-18.257-78.568v-179.631h-117.365v365.131h117.364v-53.466q21.517 30.971 49.227 46.62 28.037 15.649 61.616 15.649 37.817 0 66.832-18.257t44.011-51.183zM0 938.667v-1024h106.169v39.712h-66.457v944.576h66.457v39.712zM917.426 938.667v-39.712h66.457v-944.576h-66.457v-39.712h106.169v1024z" />
 <glyph unicode="&#xe902;" glyph-name="hipchat" d="M842.069 125.611s4.395 3.115 11.392 8.448c104.832 81.067 170.539 198.613 170.539 329.344 0 243.84-229.248 441.685-511.872 441.685-282.709 0-512.128-197.845-512.128-441.685 0-243.925 229.163-441.856 511.915-441.856 36.139 0 72.277 3.115 107.691 9.728l11.179 1.92c71.808-46.592 176.597-84.907 268.288-84.907 28.373 0 41.728 23.296 23.552 47.104-27.648 33.92-65.749 88.235-80.555 130.219zM779.691 318.72c-30.549-45.611-125.184-123.264-266.837-123.264h-1.963c-141.995 0-236.501 78.123-266.837 123.264-5.925 6.635-10.069 14.98-11.609 24.207l-0.039 0.283c-0.040 0.482-0.062 1.044-0.062 1.611 0 10.922 8.376 19.889 19.055 20.826l0.079 0.006c0.341 0.128 0.597 0.128 0.896 0.128 4.992-0.256 9.813-1.835 13.995-4.736 66.349-54.437 152.044-87.507 245.457-87.723h0.047c1.278-0.016 2.787-0.025 4.298-0.025 92.205 0 176.651 33.217 242.026 88.338l-0.564-0.463c3.493 3.227 8.18 5.205 13.33 5.205 0.009 0 0.018 0 0.027 0h-0.001c11.392 0 20.395-9.088 20.608-20.267-1.385-10.492-5.47-19.835-11.527-27.557l0.093 0.122h-0.469z" />
@@ -39,7 +38,6 @@
 <glyph unicode="&#xe911;" d="M78.102 851.887h863.458v-820.068h-863.458v820.068z" />
 <glyph unicode="&#xe912;" glyph-name="clippy" horiz-adv-x="896" d="M704 42.667h-640v576h640v-192h64v320c0 35-29 64-64 64h-192c0 71-57 128-128 128s-128-57-128-128h-192c-35 0-64-29-64-64v-704c0-35 29-64 64-64h640c35 0 64 29 64 64v128h-64v-128zM192 746.667c29 0 29 0 64 0s64 29 64 64 29 64 64 64 64-29 64-64 32-64 64-64 33 0 64 0 64-29 64-64h-512c0 39 28 64 64 64zM128 234.667h128v64h-128v-64zM576 362.667v128l-256-192 256-192v128h320v128h-320zM128 106.667h192v64h-192v-64zM448 554.667h-320v-64h320v64zM256 426.667h-128v-64h128v64z" />
 <glyph unicode="&#xe913;" glyph-name="settings" d="M512 276.667c82 0 150 68 150 150s-68 150-150 150-150-68-150-150 68-150 150-150zM830 384.667l90-70c8-6 10-18 4-28l-86-148c-6-10-16-12-26-8l-106 42c-22-16-46-32-72-42l-16-112c-2-10-10-18-20-18h-172c-10 0-18 8-20 18l-16 112c-26 10-50 24-72 42l-106-42c-10-4-20-2-26 8l-86 148c-6 10-4 22 4 28l90 70c-2 14-2 28-2 42s0 28 2 42l-90 70c-8 6-10 18-4 28l86 148c6 10 16 12 26 8l106-42c22 16 46 32 72 42l16 112c2 10 10 18 20 18h172c10 0 18-8 20-18l16-112c26-10 50-24 72-42l106 42c10 4 20 2 26-8l86-148c6-10 4-22-4-28l-90-70c2-14 2-28 2-42s0-28-2-42z" />
-<glyph unicode="&#xe914;" glyph-name="pagerteam" horiz-adv-x="981" d="M484.289 600.535c-67.542-1.322-134.652-26.387-187.221-70.263-56.96-47.541-94.861-114.277-106.117-186.879-3.371-21.755-3.183-14.333-3.367-130.672-0.144-87.121-0.309-106.544-0.894-107.030-31.25-1.325-94.191-0.875-94.191-0.875s-0.436-123.022-0.285-189.922l799.764-0.228-0.323 189.561-94.818 0.856-0.228 104.062c-0.235 112.101-0.168 109.401-3.138 130.159-1.569 10.965-4.997 27.461-7.798 37.528-26.226 94.196-95.127 169.766-186.194 204.207-32.295 12.214-64.792 18.42-101.666 19.439-4.502 0.124-9.021 0.145-13.524 0.057zM504.47 525.517c51.456 0 106.155-17.857 149.103-56.434s72.159-98.866 70.871-174.553c-1.391-48.523-73.925-47.248-73.61 1.293 0.97 57.004-18.643 93.453-46.506 118.48s-65.885 37.604-99.859 37.604c-49.962-0.897-49.962 74.507 0 73.61zM38.407 673.607c-0.476 0.022-1.035 0.035-1.596 0.035-20.33 0-36.811-16.481-36.811-36.811 0-13.706 7.49-25.662 18.6-31.998l0.181-0.095 156.359-91.3c5.323-3.162 11.735-5.030 18.583-5.030 20.347 0 36.841 16.494 36.841 36.841 0 13.498-7.259 25.301-18.087 31.717l-0.171 0.094-156.431 91.3c-4.992 3.055-10.98 4.971-17.393 5.245l-0.076 0.003zM232.796 855.199c-19.71-0.785-35.391-16.953-35.391-36.784 0-6.961 1.932-13.471 5.29-19.023l-0.092 0.165 87.202-150.968c6.296-11.786 18.515-19.67 32.577-19.67 20.33 0 36.811 16.481 36.811 36.811 0 7.295-2.122 14.094-5.782 19.814l0.088-0.148-87.13 150.968c-6.42 11.337-18.401 18.863-32.139 18.863-0.504 0-1.006-0.010-1.505-0.030l0.072 0.002zM492.029 938.663c-20.081-0.324-36.236-16.679-36.236-36.807 0-0.177 0.001-0.354 0.004-0.531v0.027-187.2c-0.002-0.155-0.004-0.338-0.004-0.521 0-20.33 16.481-36.811 36.811-36.811s36.811 16.481 36.811 36.811c0 0.183-0.001 0.366-0.004 0.548v-0.028 187.2c0.002 0.15 0.003 0.327 0.003 0.504 0 20.33-16.481 36.811-36.811 36.811-0.202 0-0.404-0.002-0.605-0.005h0.030zM945.507 669.509c-0.29 0.008-0.632 0.013-0.974 0.013-7.054 0-13.644-1.984-19.243-5.424l0.16 0.091-156.431-91.3c-11.571-6.357-19.282-18.463-19.282-32.37 0-20.33 16.481-36.811 36.811-36.811 7.253 0 14.016 2.098 19.716 5.719l-0.15-0.089 156.431 91.3c11.271 6.437 18.746 18.382 18.746 32.073 0 19.969-15.9 36.224-35.731 36.795l-0.053 0.001zM747.38 851.029c-0.089 0.001-0.193 0.001-0.298 0.001-13.728 0-25.7-7.514-32.029-18.654l-0.095-0.182-87.13-150.895c-3.572-5.572-5.694-12.371-5.694-19.666 0-20.33 16.481-36.811 36.811-36.811 14.061 0 26.281 7.884 32.48 19.472l0.096 0.198 87.202 150.895c3.256 5.381 5.182 11.882 5.182 18.832 0 20.23-16.319 36.648-36.51 36.81h-0.015z" />
 <glyph unicode="&#xe915;" glyph-name="apprise" horiz-adv-x="1103" d="M419.207-84.872c-36.821 10.251-62.633 68.381-78.184 96.84s-44.871 79.948-44.871 79.948l144.118 77.477c0 0 60.549-101.414 89.638-152.536 19.503-48.548-37.228-71.026-70.145-90.61-12.11-6.879-26.274-13.39-40.556-11.119zM139.125 116.164c-83.563 6.246-150.932 89.762-137.383 173.161 0.044 28.578 33.377 106.495 61.177 57.277 41.786-74.223 86.086-147.054 127.101-221.634-9.907-13.558-36.039-7.416-50.895-8.805zM256.767 156.935c-51.040 82.94-97.903 168.519-147.818 252.248 31.046 22.803 61.092 39.433 87.762 60.464 113.646 71.464 237.133 203.369 288.762 347.602 13.484 45.244 66.37 79.001 93.522 38.262 100.485-174.847 203.317-348.42 302.511-523.936 17.51-66.627-63.993-53.787-103.86-44.62-133.333 17.402-276.261 7.503-394.63-61.032-41.186-22.873-80.753-48.963-122.811-70.028l-3.438 1.038zM1008.674 467.334c-59.824 20.665 2.515 73.201 14.237 107.157 44.133 94.328 5.38 215.539-83.422 269.141-47.146 29.856-104.57 37.992-159.139 29.894-49.006 8.783-26.794 61.723 19.937 63.521 135.186 15.694 273.035-84.419 296.526-219.010 18.169-86.287-5.187-184.47-69.789-246.399-5.822-2.236-11.938-5.013-18.349-4.303zM874.499 514.786c-56.018 26.015 12.996 72.844 8.156 111.868 9.085 66.073-58.288 124.609-122.441 110.005-37.378 8.906-34.985 58.261 13.385 63.11 100.043 8.227 190.553-92.3 170.885-191.055-6.546-34.584-27.598-94.615-69.985-93.926z" />
 <glyph unicode="&#xe916;" horiz-adv-x="1082" d="M106.316 611.304h343.707v-379.145h-343.707v379.145z" />
 <glyph unicode="&#xe917;" d="M73.378 851.645h872.067v-843.844h-872.067v843.844z" />