Feature: #94819 - Improved Workspaces module

Description

The workspaces module has been improved in usability:

For the initial loading of the module, the AJAX request has to process less data as all information is already loaded with the module.

A loading indicator is now visible during AJAX requests to show editors that there is work in progress.

A dropdown is now used to choose between multiple workspaces, which is especially useful when having multiple workspaces.

Administrators can edit workspace settings directly from the module's docheader area.

Impact

The overall user experience has been improved and administrators do not need to use the list module to manage workspaces anymore.