MainFrame: don't auto-zoom while aero-snapped
MainFrame: adjust auto-zoom logic

Refactoring, minor tweaks to snap persistence, and reworked
EC_VIDEO_SIZE_CHANGED graph event handling.

Refs #3704
Add new color button control
Use new color button control
PPageCapture: change controls z-order

Fixes #4238
PlaylistBar: drag and drop deeply nested folders

Support it.