More options for move-window

[tshort]

It'd be nice to be able to move windows between workspaces more easily.

I like to use the last workspace as a scratch buffer. I assign option-Y (yank) to move the current window to the scratch space, and I assign option-P (paste) to move all of the windows from the scratch space to the current workspace. The last one is tricky in rift. I got it to work with a script by switching to the scratch space and repeatedly running move-window to the original space and then switching back. The problem with this is I need a 0.5-sec delay between move-window calls, and the workspace switching (and delays) cause a lot of flickering.

Options for the API could include:

• Add an option to move-window to specify the window to move.
• Add another command to pull a window into the current space.

[acsandmann]

i think we need to just expose a window_id field and this all becomes much simpler. move to space via window id as well.

[acsandmann]

#105 fix is on main and will be available next release