The Micro Design Improvements team has done some work on cleaning up the area below the edit window (cf. https://www.mediawiki.org/w/index.php?title=Micro_Design_Improvements&oldid=600253#Current_project:_Improve_the_organization_of_information_in_the_edit_mode).
These changes have been implemented for only the Vector skin and only for the English Wikipedia. This is a tracking bug to move these improvements out to other sites and skins.
T57381: Investigate removing Micro Design-related configuration from Wikimedia wikis