so eg mobile-stream goes like this
--sout="#transcode{vcodec=h264,venc=x264{profile=baseline,level=12},...."

..or it magically eats itself up

...and fix memleak when removing..

If playlist view was full with items it was hard/impossible to
add node to root if the action operated on right-clicked item.
Sort action follows the same style for consistence and practicality.

all files would be opened as directories

Pointed-out-by: cachereturn on #videolan

"[It] can be removed altogether, since it's totally useless (quality
is too bad to be of any use)."

free to change the value if needed).

rebuild() does that and sets currentItem itself. Also emit
currentChanged on rebuild, so you stay on currentItem if you add/remove
columns on view.