I've been trying to create a custom component that extends
Hslider and allows the tooltip of the slider to always be visible.
I've noticed that the tooltip is created onThumbPress and destroyed
onThumbRelease. I need to change this so that the tooltip is
created and visible on creationComplete and clicking on the track
(track_mouseDownHandler) moves the thumb and tooltip. Any help is
much appreciated. Everything I've tried has failed.