This keeps the VLC value in sync with the PulseAudio one. For some
reason, the Qt4 interface does not pick up the correct default though.

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Notes:

- The variable value represents the PulseAudio sink index.
  It is not a member of the AOUT_VAR_ enumeration.

- There is no configuration item. PulseAudio normally remembers the
  last sink VLC used. So I think there is no need value in writing
  code to duplicate that effort.

- I am not sure if we need more locking inside the variable callback.
  This needs to be clarified with PulseAudio guys.

Fixes the int64_t issue.

</joke>

This is not finished work, yet. Please refrain from comitting without
discussing before :D

Work done mostly my "Ludovic Fauvet", "Filipe Azevedo" and /me
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Most of the code churn in this commit comes from converting from void *
to uintptr.

HWND are process-wide so there is not much point in a dedicated list
per LibVLC instance.

decode URL for the Info panel, fixed potential redraw issue in the open panel

Until now, if the rate was not one of the hard-coded value, and the hot
keys would jump not to the nearest known rate, but the second nearest.

Unfortunately, we still have to account for rounding errors in the
input thread, so this is not perfect.

Alsa devices listing can be really large and make layout to expand
beyond screen size.

additionally, allow switching the time display also in fullscreen mode

fixes #3854

aka Dock, App Switcher, AppleScript, etc. Fixed #4009

[Program xxx] is a translated string.