move mention button right next to mute button

src/components/user_card/user_card.js

@@ -149,6 +149,9 @@ export default {
       }
       this.$store.dispatch('setMedia', [attachment])
       this.$store.dispatch('setCurrent', attachment)
+    },
+    mentionUser () {
+      this.$store.dispatch('openPostStatusModal', { replyTo: true, repliedUser: this.user })
     }
   }
 }