VMR-9 renderless: Always try to update the subtitle displayed when seeking while paused.

Ignore invalid timestamps since we use the one from the pin hook anyway.

VMR-7 renderless seemed unaffected by that issue but make the code consistent anyway.

Refs: ticket #3763.
EVR-CP: Always update the subtitle displayed when seeking while paused.

Fixes #3763.
Update translations from Transifex:

 - Catalan
 - Chinese (simplified)
 - Czech
 - German
 - Galician
 - Malay
 - Portuguese (Brazil)
 - Russian
 - Slovak
 - Swedish
 - Vietnamese
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.
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.