Added new sublayer to draw the background lighting image correctly in @2x. This fixes part of #669.
Adjust Libraries list height (bottom padding)
Fixes table view appearance in Setup Assistant.
Use NSViews -backingAlignedRect instead of rounding rect values.
Fix #779 by forcing table views to update scrollers.
Merge pull request #776 from loicloic/master

Adjust Libraries list height (bottom padding)
Restore grid view visible rect after editing cell. (Fixes #778)
Fix #777.
Fix #726.
Adjusted control pref headers according to #718.
Added links to about window and removed old image (#738).
Merge pull request #692 from CodinGuru/master

Fix for background lighting on #669.
Fix layout of systems in library preferences.
Fixes button label alignment (issue #627).
Added OERequiredFiles for GBA system plugin
Disable OERequiredFiles in SNES system plugin to avoid BIOS/system file check in Higan.
Higan should handle this internally alerting the user what file is required or we should have multiple opt-in levels
Restores use of the core downloader if a game is launched with the core missing
Fix no core error when there is a core
Run game after missing core downloader finishes
Provided a description of required bios/system files to the user