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Update files for 1.7.4.
Update docs/Release.txt.
Set MPC_NIGHTLY_RELEASE to 1.
Fix race warning

CID 1201438
Resolve static initialization order fiasco
StatusBar: less greedy invalidation

Fixes rare flickering.
MainFrame: call OnGetMinMaxInfo() before resize
Cosmetics
SysVersion: use 'static' for local functions
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.
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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.
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