Ensure the hardware cursor is disabled when we set the mode for a VkDisplayKHR object. The extension doesn't expose any mechanisms to program the hardware cursor, so we need to ensure it is hidden.
Currently, it seems like X is responsible for disabling the cursor before handing over the lease. But that seems a little frail, and we should be disabling the cursor ourselves so it works correctly independently of how the lease was prepared for us.
Signed-off-by: Andres Rodriguez email@example.com