message: Update widget 'widgetData' key to 'data' to match spec.
diff: @@ -137,12 +137,12 @@ export default class FromWidgetPostMessageApi {
  });
  } else if (action === 'm.sticker') {
  // console.warn('Got sticker message from widget', widgetId);
  - dis.dispatch({action: 'm.sticker', data: event.data.widgetData, widgetId: event.data.widgetId});
  + dis.dispatch({action: 'm.sticker', data: event.data.data, widgetId: event.data.widgetId});
  } else if (action === 'integration_manager_open') {
  // Close the stickerpicker
  dis.dispatch({action: 'stickerpicker_close'});
  // Open the integration manager
  - const data = event.data.widgetData;
  + const data = event.data.data;
  const integType = (data && data.integType) ? data.integType : null;
  const integId = (data && data.integId) ? data.integId : null;
  IntegrationManager.open(integType, integId);
  