Fixed a playlist race condition on input events.

The playlist was loosing state events from input. And thus it may not
always be able to detect (by itself) the end of a stream (It happens
easily with small playlist files).

Fullscreen controller button reordering to fix consistency with main toolbar (complaints from forum).

This should fix #1167

Complete fix of #1777.

Close #1777

- Add alias for most of the pixmpas. Separate in different folders.
- Change some pixmaps
- Close most of #852
- Close #1799
- Close #1780

Since the aout is destroyed when equalizer is activated, the callback registration doesn't work and only HACKs can solve that (msleep).

Close #1740

Fix most of the issues of the Equalizer.

(It begins to have a lots of "workarounds" :(

Qt4: add a file dialog needed by skins2 INTF_DIALOG_FILE_GENERIC, was available in wxWidgets, but it's not in Qt4
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Close #1776

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