Exclude state events from widgets reading room events

They can request state reading permissions to read state.

src/stores/widgets/StopGapWidgetDriver.ts

@@ -159,7 +159,7 @@ export class StopGapWidgetDriver extends WidgetDriver {
             if (results.length >= limit) break;
 
             const ev = events[i];
-            if (ev.getType() !== eventType) continue;
+            if (ev.getType() !== eventType || ev.isState()) continue;
             if (eventType === EventType.RoomMessage && msgtype && msgtype !== ev.getContent()['msgtype']) continue;
             results.push(ev);
         }