Replace namespaces filter in Special:Contributions to allow multiple choices using existing solution (Community Wishlist/W539)
Wish is to implement existing capabilities to dynamically filter namespaces in the Special:Contributions pages, which exists in Special:RecentChanges.
When trying to filter out any editor's Special:Contributions page by namespace, the only right now allowed options is to choose (simply or to invert) just 1 specific target. Especially when an exact namespace is unknown, or if you are trying to locate something this is highly inefficient in most cases - still resulting in lots of manual scrolling, etc.
However filter for namespaces from the less frequently utilized Special:RecentChanges already has the full utility to customly select as many/little namespaces as one wants, allowing to cut all the irrelevant parts out from a search.
Other same page filtering related wish for the Multiple Tags filter: W476: Allow multiple tags filters on contribution and log pages.
And another related wish: W218: Better searching of tags on contribution and history pages.
Unassigned
Editors and patrollers