Bug 1043797: extended popup notifications to create a generic doorhanger for all security notifications incl. mixed content r=adw

--HG--
rename : browser/themes/linux/mixed-content-blocked-16.png => browser/themes/linux/bad-content-blocked-16.png
rename : browser/themes/linux/mixed-content-blocked-64.png => browser/themes/linux/bad-content-blocked-64.png
rename : browser/themes/osx/mixed-content-blocked-16.png => browser/themes/osx/bad-content-blocked-16.png
rename : browser/themes/osx/mixed-content-blocked-16@2x.png => browser/themes/osx/bad-content-blocked-16@2x.png
rename : browser/themes/osx/mixed-content-blocked-64.png => browser/themes/osx/bad-content-blocked-64.png
rename : browser/themes/osx/mixed-content-blocked-64@2x.png => browser/themes/osx/bad-content-blocked-64@2x.png
rename : browser/themes/windows/mixed-content-blocked-16.png => browser/themes/windows/bad-content-blocked-16.png
rename : browser/themes/windows/mixed-content-blocked-64.png => browser/themes/windows/bad-content-blocked-64.png
Bug 1043803: checkIdentity following onSecurityChange now shows doorhanger on STATE_LOADED_MIXED_ACTIVE_CONTENT. Doorhanger now acknowledges this new state. r=adw
Bug 1045809: mixedContentChannel is set to null and page is reloaded to re-engage mixed content blocking r=jaws
Bug 1043801: tracking protection notifications show up in the generic security notification doorhanger, interactions with permissionManager to disable/enable tracking protection for a page r=adw
Bug 1043801: tests asserting doorhanger correctly reflects tracking protection state r=adw