Action menu updates

Done:
* Fixed order of actions in actions menu
* No more borders on action menu buttons (they're mw-ui-quiet now)
* Added divider between normal actions and moderation actions
* Added un* buttons instead of generic "restore", with their
  respective icons
  * Updated icons in history as well
  * TODO: I'll minify the SVG's in a later patch - lots of unoptimized existing
* Fixed ellipsis icon
* Got rid of unused *_onclick icons
* Repurposed *_onclick icon colors for :hover & :active icons
* Swapped moderation icons: _normal should be colored
* Updated hide & suppress icons (no longer minus & cross icons)
* Changed *-restore-* messages to more specific unhide/-delete/-suppress
* Fixed moderation to work with new classes, but still submit action "restore"

Change-Id: Ia29a3c4900bdfd39716b0b545c44e5ac400adbb3
Minify SVG files

$ svgo -f modules/base/images --disable=removeXMLProcInst

Change-Id: I388ea0b545ecf2e6fc8290066acdf762fba19bbc
Merge "Action menu updates"
Merge "Minify SVG files"