message: Don't needlessly persist user widgets
  Fixes
  We don't have a concept of a stickerpicker staying on screen, so don't make it a thing yet.
diff: @@ -375,9 +375,11 @@ export default class AppTile extends React.Component {
  </div>
  );
  - // all widgets can theoretically be allowed to remain on screen, so we wrap
  - // them all in a PersistedElement from the get-go. If we wait, the iframe will
  - // be re-mounted later, which means the widget has to start over, which is bad.
  + if (!this.props.userWidget) {
  + // All room widgets can theoretically be allowed to remain on screen, so we
  + // wrap them all in a PersistedElement from the get-go. If we wait, the iframe
  + // will be re-mounted later, which means the widget has to start over, which is
  + // bad.
  // Also wrap the PersistedElement in a div to fix the height, otherwise
  // AppTile's border is in the wrong place
  @@ -388,6 +390,7 @@ export default class AppTile extends React.Component {
  </div>;
  }
  }
  + }
  let appTileClasses;
  if (this.props.miniMode) {
  