Refactor: Minor code refactoring in accordance with Vue.js best practices (#368)

app/javascript/dashboard/components/widgets/conversation/ReplyBox.vue

@@ -27,7 +27,7 @@
         class="icon ion-happy-outline"
         :class="{ active: showEmojiPicker }"
         @click="toggleEmojiPicker()"
-      ></i>
+      />
     </div>
 
     <div class="reply-box__bottom">
@@ -65,7 +65,7 @@
             'ion-android-send': !isPrivate,
             'ion-android-lock': isPrivate,
           }"
-        ></i>
+        />
       </button>
     </div>
   </div>
@@ -114,7 +114,7 @@ export default {
         return;
       }
       const isSlashCommand = val[0] === '/';
-      const hasNextWord = val.indexOf(' ') > -1;
+      const hasNextWord = val.includes(' ');
       const isShortCodeActive = isSlashCommand && !hasNextWord;
       if (isShortCodeActive) {
         this.showCannedResponsesList = true;