DVBSub: Ensure no region is lost to avoid partially rendered subs.

Some regions can be received before they are actually needed. We used to
ignore them but we can need them later so we can't do that.
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.