This way item is redrawn when current item changes.

This is needed for out-of-tree modules. We need to translate their
plugin descriptor strings from their domain.

They cannot do it themselves. Their strings may be in the plugins
cache, in which case the plugins may not be loaded at all.

vlc_object_find is not used for the playlist anymore, so this is OK.

We now properly layout elements, and size the window accordingly.

Now you can click on URLs

If true, load the extensions on startup. Otherwise, don't load
them automatically.

This flag will indicate that we can't load the extensions module,
thus preventing many unnecessary (failing) loads on ViewMenu::exec()

Clean Extension dialogs and widgets without using a cond_timedwait but
a simple cond_wait instead.

The QPixmapCache default size is 10240kB on desktops, this leaves room
for 640 pictures 64x64 in rgba

Improves scrolling with a lot of items.

Also use art url from the first children with art for nodes without art

TODO: cache the full rendering (text + art), QPixmap is a QPaintDevice
subclass

Only respond to input item change if in icon view.
Update location bar according to current view.

And add a debug msg when sorting happens.