macosx: added 'subsdelay' to the track synchro panel and removed the bogus, non HIG-compliant plus and minux buttons

macosx: implemented drag & drop from playlist to media library and vice verca. additionally, drag from SD to ML or PL is supported. (close #6044)

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

Close #6575
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Shoulc close #5952
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

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

macosx: removed VLCControllerView, which was superseeded by VLBrushedMetalImageView and VLCThreePartDropView

macosx: refuse file drops on the playlist table if the current root item is neither the local playlist nor the media library

vout_macosx: re-write VOUT_DISPLAY_CHANGE_FULLSCREEN the way it was intended and update the display size correctly, so we get sharp OSD rendering

macosx: fixed appearance issue when collapsing / expanding the playlist while it is empty (close #6382)

macosx: set a sane minimum size for the advanced prefs window, so the options remain useable (close #5994)

Previously, VLC would assume 4/3 picture aspect ratio. That was quite
lame. This patch makes --v4l2-aspect-ratio redundant.

This disables driver-specific modes that VLC would not know about.
This also disables high quality (i.e. still camera) mode since we want
video, as well as other any other future abnormal modes.

Somewhat fixes a big usability problem: tiny buttons, unrevealant icons
and associated text shown as tooltip.
We now reveal all text on mouseover.

We will get more and more of those samples soon...