* Reduce size of buttons, form inputs, site menu items, paginator, and
sidebar text.
* Remove various dead rules (nonexistent selectors, rules overriden by
other rules, rules that were otherwise redundant or did nothing).
* Increase page margin size.
* Fix notes being mispositioned (caused by `#image { margin-top: 5px }` rule).
* Consolidate blacklist css in one file.
* blacklist box: fix tag colors not dimming on hover.
* blacklist box: allow middle clicking on tags to open in new tab.
* /wiki_pages: move blacklist controls to top of tag sidebar.
* /wiki_pages: fix missing "disable all" / "re-enable all" buttons.