fix bug in teleop panel, slider labels did not update interactively
fix bug in teleop panel, slider labels did not update interactively

gizatt/director,edowson/director,openhumanoids/director,manuelli/director,openhumanoids/director,edowson/director,RobotLocomotion/director,manuelli/director,mitdrc/director,empireryan/director,empireryan/director,edowson/director,mitdrc/director,mithrandir123/director,mitdrc/director,gizatt/director,manuelli/director,gizatt/director,patmarion/director,rdeits/director,RussTedrake/director,patmarion/director,empireryan/director,mitdrc/director,edowson/director,mithrandir123/director,RobotLocomotion/director,empireryan/director,rdeits/director,patmarion/director,RobotLocomotion/director,manuelli/director,RussTedrake/director,mithrandir123/director,edowson/director,empireryan/director,mitdrc/director,rdeits/director,openhumanoids/director,manuelli/director,openhumanoids/director,gizatt/director,rdeits/director,rdeits/director,patmarion/director,RobotLocomotion/director,RussTedrake/director,patmarion/director,mithrandir123/director,mithrandir123/director,RobotLocomotion/director,gizatt/director,RussTedrake/director,openhumanoids/director,RussTedrake/director