#5 hide vertical toolbar's spring widget
nit
#5 messed up a little
#5 these aren't actually needed
#5 no persona footer when addonbar is shrinked
#5 special widgets in menu-panel + bugfix
#5 sandboxed the CUI stuff
#5 delegate native add-on bar to ours
#5 show add-on bar when migrating widgets
#5 restore the status bar as well
#5 don't flex location and search bars with addon bar in it
#5 bunch of bugfixes and OS specific tweaks