Revert "MPCVideoDec: fixed playback h264 after "stop" on Intel HD Graphics (force recreate dxva decoder)."

This reverts commit 6d51fc694ab79ea51e530ba7eeab7ea3a548e9a8.

This caused many issues like green screen when starting playback.
Subtitles downloader: Sort by language and then by filename by default.

Fixes #2144.
Initialize variables in the constructor.
losslessly compress res/tickcross.png
update lcms2 to 570d411
Cppcheck fixes:

* reduce variable scope
* remove unneeded variable assignments
update Authors.txt
MPCVideoDec: fixed playback h264 after "stop" on Intel HD Graphics (second very safe version).
PlayerPlaylistBar.cpp: fix x64 warnings
run astyle
SubtitleDlDlg: fix x64 warnings
Update the Changelog.
SubtitleDlDlg: Double-clicking/Pressing Enter download the selected files.

This commit fixes #2926.
SubtitleDlDlg: Cosmetics and minor optimization.
Fix: "File > Load Subtitle" wasn't working anymore for DVD.

The unwanted check that limited that menu entry to file playback was mistakenly added in a84038a34eb505fff671956282f8746811e7bbe9.

This commit fixes #3023.
Sanify some unclear code.
Cosmetics: Use explicitly NULL/FALSE constants to make the code clearer.
update Changelog.txt
Change the Donations url to the new one.
Shaders: rename resources to be presentable