fix: Improve dark mode styling

fix: Improve user and group list styling
fix: Member list reload when changing permissions, closes #1999

app/menus/MemberMenu.js

@@ -1,5 +1,4 @@
 // @flow
-import { observer } from "mobx-react";
 import * as React from "react";
 import { useTranslation } from "react-i18next";
 import { useMenuState } from "reakit/Menu";
@@ -33,4 +32,4 @@ function MemberMenu({ onRemove }: Props) {
   );
 }
 
-export default observer(MemberMenu);
+export default MemberMenu;