[Glitch] Fix custom emoji selection

Port f28715d370 to glitch-soc

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

app/javascript/flavours/glitch/actions/compose.js

@@ -704,7 +704,7 @@ export function selectComposeSuggestion(position, token, suggestion, path) {
     let completion, startPosition;
 
     if (suggestion.type === 'emoji') {
-      completion    = suggestion.native || suggestion.colons;
+      completion    = suggestion.native || `:${suggestion.id}:`;
       startPosition = position - 1;
 
       dispatch(useEmoji(suggestion));