fix(wm): handle moving windows to/from floating workspaces

This commit fixes the issue related to moving windows to/from a floating
workspace to a tiled workspace.

Previously the start of the move would be ignored however when moving
back from a tiled workspace since it didn't know about the existance of
that window it would also "move" that workspace focused tiled window
without physically moving it, leaving it in a weird state that seemed
like it was unmanaged.

This commit changes the way this mouse moves are handled and now also
handles moving `floating_windows` and even monocle or maximized windows.