[Glitch] Add assets from Twemoji 13.1.0

Port abd7b4636a to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/flavours/glitch/styles/components/emoji_picker.scss

@@ -48,6 +48,8 @@
   overflow: hidden;
   transition: color .1s ease-out;
   cursor: pointer;
+  background: transparent;
+  border: 0;
 
   &:hover {
     color: darken($lighter-text-color, 4%);
@@ -106,11 +108,13 @@
   padding: 10px;
   padding-right: 45px;
   background: $simple-background-color;
+  position: relative;
 
   input {
     font-size: 14px;
     font-weight: 400;
     padding: 7px 9px;
+    padding-right: 25px;
     font-family: inherit;
     display: block;
     width: 100%;
@@ -131,6 +135,30 @@
   }
 }
 
+.emoji-mart-search-icon {
+  position: absolute;
+  top: 18px;
+  right: 45px + 5px;
+  z-index: 2;
+  padding: 2px 5px 1px;
+  border: 0;
+  background: none;
+  transition: all 100ms linear;
+  transition-property: opacity;
+  pointer-events: auto;
+  opacity: 0.7;
+
+  &:disabled {
+    cursor: default;
+    pointer-events: none;
+    opacity: 0.3;
+  }
+
+  svg {
+    fill: $action-button-color;
+  }
+}
+
 .emoji-mart-category .emoji-mart-emoji {
   cursor: pointer;
 
@@ -169,9 +197,36 @@
   }
 }
 
+/* For screenreaders only, via https://stackoverflow.com/a/19758620 */
+.emoji-mart-sr-only {
+  position: absolute;
+  width: 1px;
+  height: 1px;
+  padding: 0;
+  margin: -1px;
+  overflow: hidden;
+  clip: rect(0, 0, 0, 0);
+  border: 0;
+}
+
+.emoji-mart-category-list {
+  margin: 0;
+  padding: 0;
+}
+
+.emoji-mart-category-list li {
+  list-style: none;
+  margin: 0;
+  padding: 0;
+  display: inline-block;
+}
+
 .emoji-mart-emoji {
   position: relative;
   display: inline-block;
+  background: transparent;
+  border: 0;
+  padding: 0;
   font-size: 0;
 
   span {
@@ -182,19 +237,17 @@
 
 .emoji-mart-no-results {
   font-size: 14px;
-  text-align: center;
-  padding-top: 70px;
   color: $light-text-color;
+  text-align: center;
+  padding: 5px 6px;
+  padding-top: 70px;
 
-  .emoji-mart-category-label {
-    display: none;
-  }
-
-  .emoji-mart-no-results-label {
+ .emoji-mart-no-results-label {
     margin-top: .2em;
   }
 
   .emoji-mart-emoji:hover::before {
+    cursor: default;
     content: none;
   }
 }