delete x11 mouse-in job when hiding the job's client
delete x11 mouse-in job when hiding the job's client

spurious x11 mouse events will be received when activating a mouse binding which
flips the active desk

fix T3716

tasn/enlightenment,rvandegrift/e,rvandegrift/e,tasn/enlightenment,rvandegrift/e,tasn/enlightenment