Merge branch '848-change-emoji-reaction-defaults' into 'develop'

ReactButton: Change the combined emoji (heart) to a simple one.

Closes #848

See merge request !1131

src/components/react_button/react_button.js

@@ -24,7 +24,7 @@ const ReactButton = {
   },
   computed: {
     commonEmojis () {
-      return ['❤️', '😠', '👀', '😂', '🔥']
+      return ['👍', '😠', '👀', '😂', '🔥']
     },
     emojis () {
       if (this.filterWord !== '') {