Fix WebUI crash when a toot with a playing video gets deleted

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/flavours/glitch/actions/picture_in_picture.js

@@ -22,13 +22,20 @@ export const PICTURE_IN_PICTURE_REMOVE = 'PICTURE_IN_PICTURE_REMOVE';
  * @param {MediaProps} props
  * @return {object}
  */
-export const deployPictureInPicture = (statusId, accountId, playerType, props) => ({
+export const deployPictureInPicture = (statusId, accountId, playerType, props) => {
+  return (dispatch, getState) => {
+    // Do not open a player for a toot that does not exist
+    if (getState().hasIn(['statuses', statusId])) {
+      dispatch({
         type: PICTURE_IN_PICTURE_DEPLOY,
         statusId,
         accountId,
         playerType,
         props,
       });
+    }
+  };
+};
 
 /*
  * @return {object}