Make mentions readonly for now (#419)

src/partials/messenger.ts

@@ -629,6 +629,7 @@ class ConversationController {
      * Handle mention selector navigation
      */
     public onComposeKeyDown = (ev: KeyboardEvent): boolean => {
+        /* Make mentions readonly for now
         if (this.showMentionSelector() && !ev.shiftKey) {
             let move = ev.key === 'ArrowDown' ? 1 : (ev.key === 'ArrowUp' ? - 1 : 0);
             if (move !== 0) {
@@ -659,7 +660,7 @@ class ConversationController {
                 return false;
             }
         }
-
+        */
         return true;
     }