allow to drag tabs to other workspaces

We simply re-use the move code.
The major pitfall is that we must not unmap the dragged window, since it
holds a pointer grab (which will break by unmapping it, so we fail to
continue or finish the tab drag)
Instead, the window is always send to the current workspace and if
detached, all other clients in the group are send back to their original
desktop.

REQUEST: 234

0 files changed, 0 insertions, 0 deletions