Make the Confidence Slider jump between intervals
Insert steps into the range: 0 -> 25 % -> 50 % -> 75 % -> 100 %
The steps corresponds to the tooltips: "geraten" (0 %) -> "sehr unsicher" (25 %) -> "unsicher" (50 %) -> "relativ sicher" (75 %) -> "absolut sicher" (100 %)
https://refreshless.com/nouislider/slider-options/#section-step