Clean up code

src/components/emoji_picker/emoji_picker.js

@@ -192,13 +192,9 @@ const EmojiPicker = {
         setScroll(right + margin - headerCont.clientWidth)
       }
     },
-    highlight (index) {
+    highlight (groupId) {
       this.setShowStickers(false)
-      const item = this.filteredEmojiGroups[index]
-      if (!item) {
-        return
-      }
-      const indexInList = this.emojiItems.findIndex(k => k.id === item.id)
+      const indexInList = this.emojiItems.findIndex(k => k.id === groupId)
       this.$refs['emoji-groups'].scrollToItem(indexInList)
     },
     updateScrolledClass (target) {
@@ -261,9 +257,6 @@ const EmojiPicker = {
       this.filteredEmojiGroups = this.getFilteredEmojiGroups()
     }
   },
-  mounted () {
-    this.recalculateItemPerRow()
-  },
   computed: {
     minItemSize () {
       return this.emojiHeight

src/components/emoji_picker/emoji_picker.vue

@@ -13,7 +13,7 @@
           class="emoji-tabs"
         >
           <span
-            v-for="(group, index) in filteredEmojiGroups"
+            v-for="group in filteredEmojiGroups"
             :ref="setGroupRef('group-header-' + group.id)"
             :key="group.id"
             class="emoji-tabs-item"
@@ -21,7 +21,7 @@
               active: activeGroupView === group.id
             }"
             :title="group.text"
-            @click.prevent="highlight(index)"
+            @click.prevent="highlight(group.id)"
           >
             <span
               v-if="group.image"