607730e96c
When grabbing with DND, we need to leave the pointer alone and under the client's control. The code here was a bit messy before about when it unset the window cursor -- it did it whenever there was no current surface after repicking, which is a bit wrong, since it will fire during a drag grab. Move the check for this to update_cursor_surface, which is our standard "sync" API for this, and then call update_cursor_surface after we set the focus.