Fix race condition causing shallow status with only a "favourited" attribute (#9272)

Fixes #9231

app/javascript/mastodon/reducers/statuses.js

@@ -38,11 +38,11 @@ export default function statuses(state = initialState, action) {
   case FAVOURITE_REQUEST:
     return state.setIn([action.status.get('id'), 'favourited'], true);
   case FAVOURITE_FAIL:
-    return state.setIn([action.status.get('id'), 'favourited'], false);
+    return state.get(action.status.get('id')) === undefined ? state : state.setIn([action.status.get('id'), 'favourited'], false);
   case REBLOG_REQUEST:
     return state.setIn([action.status.get('id'), 'reblogged'], true);
   case REBLOG_FAIL:
-    return state.setIn([action.status.get('id'), 'reblogged'], false);
+    return state.get(action.status.get('id')) === undefined ? state : state.setIn([action.status.get('id'), 'reblogged'], false);
   case STATUS_MUTE_SUCCESS:
     return state.setIn([action.id, 'muted'], true);
   case STATUS_UNMUTE_SUCCESS: