Bug 906223 - Add currently running app to the registry if it isn't already there. r=fabrice

--HG--
rename : toolkit/webapps/tests/test_hosted_launch.xul => toolkit/webapps/tests/test_hosted_launch_no_registry.xul
rename : toolkit/webapps/tests/test_packaged_launch.xul => toolkit/webapps/tests/test_packaged_launch_no_registry.xul
Bug 976580 - Set cue state to dirty when video resize happens. r=rillian, r=bz

This way when the video is resized the rendering algorithm for the cues
will run again and hence, the caption size will be increased/decreased
for the new size of the video.
Bug 982189 - Fix Input type="number" immutability. r=jst
Bug 984101 - Undo some of our more aggressive new poisoning to get back performance. r=jonco