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
Fix: Possible double free when resetting PGS subtitles.

This resulted in random crashes when seeking quickly in a file with PGS subtitles and other various cases.

Fixes #4240.
Update translations from Transifex:

 - Catalan
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Fixes #4268.
Don't prevent the users from using the ISR if they choose not to block VSFilter like filters.

This commit fixes ticket #4231.
PGS subtitles: Enqueue empty segments to be sure subtitles are properly cleared when using the queue.

This is a work-around and will be improved later.

Refs: #3691.
Update translations from Transifex:

 - Croatian
 - Dutch
 - German
 - Japanese
 - Spanish
 - Ukrainian
 - Vietnamese
Update files for v1.7.5 release.
Update docs/Release.txt.
Set MPC_NIGHTLY_RELEASE to 1.
Readme.md: switch to SVG badge.
SubPic: Update SubPicAP to support SubRenderIntf.h version 1.0.8.

Adds the new Clear() method which allows the renderer to invalidate the queue.
SubPicQueue: Use intsafe.h instead of hardcoded values.
version.h: Base nightly status on revision number.