Translations: Move the language resources to their own file.
Move the UI language selection to the option dialog.

The growing number of translations makes the menu difficult to use.
UI language: Remove the resource IDs.

We don't need resource IDs anymore except to maintain compatibility with the language setting saved from really old versions (nearly two years old). The compatibility gain isn't worth the trouble so people upgrading from those old versions will now have the UI language reset to the default language based on Windows localization.
Subresync bar: Use translatable strings when possible.
Capture dialog: Split some functions and factorize some code.
Fix: The dockable bars were not updated when changing the UI language.
Use the event system to handle UI language changes.
Option dialog: Reload the dialog in case of language change.

The dialog will be closed and reopened when "Apply" is pressed if the language was changed.
Cosmetics: Fix a typo (recieves --> receives).
PGS Subtitles: Restore some locks that went missing during ffd5478189f7b27b0ccb7b4fff7307418ce77e98.

Some subtitles could be missing and generally some strange behaviors could occur.

Refs: #3691.
MainFrame: cosmetics

[](){} confused astyle here.
[]{} does not.
MainFrame: adjust auto-zoom logic

When video size changes during playback, reposition the window only
if "auto-zoom" AND "limit window proportions" options are enabled.

Refs #3704
MainFrame: fix aero-snap misdetection

Refs #4284
MainFrame: don't reset position when aero-snapped
MainFrame: don't access class as memory chunk
MainFrame: adjust auto-zoom logic yet more

We auto-zoom when we loose the video during playback.
So it makes sense to auto-zoom when we regain it too.
StatusBar: flickerless paint
InfoBar: fix aggressive relayout

Better performance. Fixes some visual glitches.
MainFrame: don't exit d3dfs in OnFilePostOpenmedia
Update Changelog.txt