Comment 1 for bug 1600220

Last time we discussed this I suggested the Mir client API just needed something like mir_warp_cursor_to(x, y) [where x,y might be relative to a surface, which might be a fullscreen Unity8 surface]. And you could limit the operation to the currently focussed surface too, so there are no privilege concerns.

Since Unity8 is just a client of USC I feel like that should resolve this...?