fix(draggable): cancel stop-listener when started dragging again

[barthy-koeln]

Steps to replicate:

• Enable draggable on the slider
• Slide around using the dragging feature
• Let go of the pointer and immediately start dragging again

-> The slider jumps to the start or end of the slide

Bug Found

When releasing the drag, an event listener is added for the slide-stop event, that is delayed by a few hundred milliseconds.

This event listener resets styles enabled for the dragging. When starting the drag between releasing the pointer and the execution of the listener, the bug occurs.

Solution

Remove the event listener when starting a new drag.