Always force redraw when the subtitle provider is changed.

There can be cases where the subtitle provider seems to be the same but we need to redraw anyway (e.g. style changes). Since SetSubPicProvider isn't often called, it's not worth making the logic more complex just to save a few redraws.
DVBSub: Fix a stupid parsing bug leading to the wrong page being used.

There is absolutely no reason to copy the region list from the previous page since that means we would just be displaying the old page again instead of the updated one...
DVBSub: Ensure no region is lost to avoid partially rendered subs.

Some regions can be received before they are actually needed. We use to ignore them but we shouldn't have.
Update Changelog.txt
DVB and PGS subtitles: Subtitles were sometimes one frame late.

This was invisible most of the time but it could produce blinking in some cases.
Updated LAV Filters to 0.60.1-65-ddc46e6 (custom build based on 0.60.1-60-445393e)

Important change:
 - LAV Video: Fix artifacts on some H264 streams with both software and DXVA decoding (reported upstream as https://trac.ffmpeg.org/ticket/3386).
Lite builds: Fix a minor inconsistency regarding the output directory.

Lite debug builds use "mpc-hc_x??_Debug Lite" while release builds always used "mpc-hc_x??" for both normal and lite builds.
Fix: x86 and x64 versions conflicted over file associations.

4f465cf8b81f1da800b1bfc57cc48e317d24fbb5 was incomplete for Vista+.

This commit fixes #4064.
Language menu: Ensure "Language" always appears in English in menu entry.

If "Language" doesn't appear in the translated string, "(Language)" will be appended automatically.