WMR-7 renderless: subtitles were not displayed except in fullscreen.

This issue was introduced in aa4a1acb57fc28fd464942d48b5f9987d88df82f.
Workaround a crash in the math library for x64 builds.

See http://connect.microsoft.com/VisualStudio/feedback/details/811093

It occured when the CPU supports FMA3 and support for AVX is disabled in the operating system.

This commit fixes #3999.
Update translations from Transifex:

 - Catalan
 - Chinese (simplified)
 - Czech
 - German
 - Galician
 - Malay
 - Portuguese (Brazil)
 - Russian
 - Slovak
 - Swedish
 - Vietnamese
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.
Language menu: Use submenus to group language names starting with the same character.
Update translations from Transifex:

 - Greek.
Options dialog: Disable "Reset" when the INI is read-only.

Ref #3591.