AppSettings: Unbind "switch zoom" by default.

Rarely used feature, but easy to accidentally activate in which case it will confuse users.
Losslessly compress res/web/img.
Whitespace cosmetics.

Remove unneeded spaces and reindent comments in some cases to improve readability.
Update Changelog.txt.
pre-commit.sh: use 2 spaces for indentation.
Show available audio tracks in Play > Audio menu when the Audio Switcher isn't used (DVD and DVB mostly).
Show available subtitles tracks in Play > Subtitles menu for DVD and DVB.
Show available video streams/angles in a new sub-menu in Play menu.
Remove track selection sub-menus from the Navigate menu now that they the sub-menus can provide the same features.
Skip initial track selection process if only one track is available.
Cosmetics.
Move "Go To" menu entry to the "Navigate" menu.