Workspaces module get place on "top" of all modules
After uninstalling the new sysext "info", the Workspaces module is on the first position of the modules menu (even before "Web>Page").
Since we moved several old hardcoded modules to sysext, they can also be uninstalled. Some extensions place their backend modules using the t3lib_extMgm::addModule() call and setting the $position parameter to one of these old hardcoded extensions.
E.g. the workspaces module registers himself for "before:info". So if "info" is not installed, the default would be to be placed "at the end". This is even documented in the method addModule(), but it doesn't work.