WinGui: Update the video preview window icon. Was using the wrong one.

git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@5867 b64f7644-9d1e-0410-96f1-a4d463321fa5
Push 2 new folder/file icons into the main gfx folder.

git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@5868 b64f7644-9d1e-0410-96f1-a4d463321fa5