[openbox] move all windows between two desktops

[Łukasz Grabowski]

Hello,

my desktop 1 is web browser, email and some adhoc stuff, the other ones
are fairly task-focussed. 

Because of the way I have my shortcuts configured, it's most convenient
when the task I'm currently working on is on desktop 2. So is there a
nice way to move all windows from desktop 3 to desktop 2 and all
windows from desktop 2 to desktop 3 at the same time?

Best,
Lukasz