Only trap escape key for cancel reply if there is a reply (#11140)

fall through (to clear read marker) otherwise

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

src/components/views/rooms/SendMessageComposer.tsx

@@ -351,6 +351,7 @@ export class SendMessageComposer extends React.Component<ISendMessageComposerPro
                 }
                 break;
             case KeyBindingAction.CancelReplyOrEdit:
+                if (!!this.context.replyToEvent) {
                     dis.dispatch({
                         action: "reply_to_event",
                         event: null,
@@ -358,6 +359,7 @@ export class SendMessageComposer extends React.Component<ISendMessageComposerPro
                     });
                     event.preventDefault();
                     event.stopPropagation();
+                }
                 break;
         }
     };