Bug 932854 - when a site uses a hidden plugin, show a notification bar to aid discoverability. This patch, suitable for trunk and branch, uses existing strings which are not ideal. r=jaws
Bug 883404 (UI portion) - Disable running plugins on the current page when the user chooses "Block", r=jaws
Bug 932854 test fixup - reset the test plugin state only after the UI has finished checking plugin state, r=gfritzsche