spawn_on_empty behavior

[AgrimV]

spawn_on_empty at the moment switches to the requested tag first and then runs whatever command is specified if the tag in question happens to be empty.

This sounds fine so far, but the thing is it always "switches" to the tag regardless of if the tag is empty or not, this behavior interrupts view_current_to_back and it may even interrupt view,-1[,0] bind if spawn_on_empty is invoked more than once.

Just want to know how everyone would expect it to work,?
imo, the tag switch should be removed altogether from this bind, but the spawn_shell bind will need to be tweaked for this to be possible