Suggestion for rewrite of Top edit: Add an 'All' option to display a top-100 edited pages list across all namespaces.

A use case for this is a user wanting to know where they have put most of their work, no matter the namespace. Also, perhaps if a user is wanting to attain new rights, others can better easily judge where the prospective rights-getter is accumulating their edits. Currently, one would have to eyeball this between separate namespace lists.

Also, we should have the namespace list update whenever there is a change to the project/wiki field and pull this list from the API rather than having it hardcoded (but add a hard-coded "All" option at the top).

No caching for now (T161057 will add that).