Some initial work on replacing icons with FA5

src/components/emoji_picker/emoji_picker.vue

@@ -13,7 +13,7 @@
           :title="group.text"
           @click.prevent="highlight(group.id)"
         >
-          <i :class="group.icon" />
+          <FAIcon :icon="group.icon" fixed-width/>
         </span>
       </span>
       <span
@@ -26,7 +26,7 @@
           :title="$t('emoji.stickers')"
           @click.prevent="toggleStickers"
         >
-          <i class="icon-star" />
+          <FAIcon icon="sticky-note" fixed-width/>
         </span>
       </span>
     </div>