NOTE: Does not work with Greasemonkey as it neither supports GM_registerMenuCommand nor GM_unregisterMenuCommand.
Use Tampermonkey or Violentmonkey instead.
You can configure whether or not to hide the
member sidebars when the "Hide sidebars" menu is pressed (by default, all of them are).
If the member sidebar is already hidden through the "Member List" button, it will remain hidden when the "Show sidebars" menu is pressed.