El Capitan regressions

[ksherlock]

• [ ] eject button doesn't turn red when the media slot is no longer available (tintColor)
• [ ] slot menu items are not italicized when default
• [x] mame cheat sheet javascript doesn't work (show/hide MacBook keys)
• [x] DownloadWindow.xib - Leading or trailing image position before 10.12
• [x] Recent Disk Images text color