MacGui: made the corners of the stop icon a bit rounder.

git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@6522 b64f7644-9d1e-0410-96f1-a4d463321fa5
MacGui: updated the "add all to queue" alert to say it will use the current preset, not the current settings.

git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@6523 b64f7644-9d1e-0410-96f1-a4d463321fa5