Add view_room to Action enum (#7203)

* Add ViewRoom action to Action enum

Signed-off-by: Renan <renancleyson.f@gmail.com>

* Change view_room occurrences to Action.ViewRoom

Signed-off-by: Renan <renancleyson.f@gmail.com>

* Add missing Action import

src/components/views/toasts/VerificationRequestToast.tsx

@@ -112,7 +112,7 @@ export default class VerificationRequestToast extends React.PureComponent<IProps
         try {
             if (request.channel.roomId) {
                 dis.dispatch({
-                    action: 'view_room',
+                    action: Action.ViewRoom,
                     room_id: request.channel.roomId,
                     should_peek: false,
                 });