MacGui: More Preview Window changes.

MacGui: More Preview Window changes.
- Refactor more code and reduce calls to setViewSize even more.
- Correctly show the gray storage size - display size area in both windowed and scale to screen.
- Restore 85% max windowed size which was changed in 3124 (unless in scale to screen mode).
- Correct Live Preview movie size when in scale to screen.
- Depending on window resizing and screen constraints repositioning of window after resize is a bit wonky.
- Known issue with live preview, when the movie is the full size of the window, the controller bar does not show during live preview playback, however the movies plays fine. Needs to rescale to allow for the 15 px increase in height for controller bar or better yet, implement hud movie controls.

git-svn-id: svn://localhost/HandBrake/trunk@3151 b64f7644-9d1e-0410-96f1-a4d463321fa5