Playlist: add "Open file location" menu item

Fixes #3323
VMROSD: use proper callback function prototype
MainFrm: Prevent XySubFilter from being removed from the graph when cleaning up unconnected filters.

Temporary fix, either offer external subtitles as a pin on the graph or stop cleaning up the graph entirely.

Based on patch by Aleksoid.
Add AfxGetMainFrame() macro
PlayerSeekbar: code refactoring
PlayerSeekbar: smoother mouse seek
PlayerToolbar: be consistent with hand cursor

Previously it changed to arrow on right click
Update lcms2 to 8928bed.
Webserver: Convert the remaining png files to 8-bit.
Update docs/Compilation.txt for VS2012.
Updated Czech translation
Run astyle.
Update LAVFilters to 0.58.2
Update Changelog.txt and versions.txt
Updated German translation.
Updated Simplified Chinese translation.
PlayerSeekbar: bring back hide tooltip by timeout

It was removed in 084f3ebd9cd4bddf28aa94d737ccf5a2c37ca47c
New timeout is 3 seconds, old timeout was 1 second
Prevent locking the desktop window when aero is on

Fixes #903
Update Changelog.txt.
Updated Basque translation (ticket #2890).