macosx: make sure that the video output is displayed in case the user requests a different item from the playlist (close #6041)

macosx: default disable the native fullscreen mode on Lion since it is confusing for users with multi-screen setups

macosx: implemented accessibility code for the custom window buttons used in the black window style (close #6093)

based upon sample code by Peter Maurer - thanks so much!

the osd sliders don't display correctly - no idea why yet so far

macosx: make sure to always exit the fullscreen mode on Lion when terminating to prevent ugly artifacts on the next launch

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

Fix #6078
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Revert "macosx: prevent unwanted strings from being displayed instead of empty strings as suggested by xtophe"

This reverts commit a97666db.

macosx: prevent unwanted strings from being displayed instead of empty strings as suggested by xtophe

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

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

This last occurrence of MSG_ERR led to a memory leak.
In addition, avoid spamming the logs. A debug message is enough.

This closes #6064

As "Ok" did not mean which action would have been done.

DBCS countries assign their currency symbol to '\', ASCII 92. This causes
an unexpected behavior when converting a directory separator on OS/2.
In case of GNU libiconv, it does not treat '\', ASCII 92, as a currency
symbol at all. So let's mimic GNU libiconv.
Signed-off-by: Rafaël Carré <funman@videolan.org>

OS/2 supports UCS-2 only instead of UTF-16.
Signed-off-by: Rafaël Carré <funman@videolan.org>

macosx: fixed wrong behavior of the drop zone introduced in [7f63022f] (close #6071)