Sliders
Standard horizontal slider
Vertical slider
Slider with predefined values [2,4,6,8] and a non-default range [2,15]
Slider with multiple handles
Slider with multiple handles and predefined values
Slider with multiple handles, external controls, handles are restricted (can't be moved prior/after adjacent handles)
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Fun with spans
Slider with span and [1,10] range (test for #3731)