fix: Inoperable dashboard filter slider when range is <= 1 (#27271)

Co-authored-by: Justin Francos <jfrancos@manifold.ai>
(cherry picked from commit ce9e4b4)

superset-frontend/src/filters/components/Range/RangeFilterPlugin.tsx

@@ -300,6 +300,16 @@ export default function RangeFilterPlugin(props: PluginFilterRangeProps) {
     }
   }, [enableSingleExactValue]);
 
+  const MIN_NUM_STEPS = 20;
+  const stepHeuristic = (min: number, max: number) => {
+    const maxStepSize = (max - min) / MIN_NUM_STEPS;
+    // normalizedStepSize: .06 -> .01, .003 -> .001
+    const normalizedStepSize = `1E${Math.floor(Math.log10(maxStepSize))}`;
+    return Math.min(1, parseFloat(normalizedStepSize));
+  };
+
+  const step = max - min <= 1 ? stepHeuristic(min, max) : 1;
+
   return (
     <FilterPluginStyle height={height} width={width}>
       {Number.isNaN(Number(min)) || Number.isNaN(Number(max)) ? (
@@ -323,6 +333,7 @@ export default function RangeFilterPlugin(props: PluginFilterRangeProps) {
               <AntdSlider
                 min={min}
                 max={max}
+                step={step}
                 value={minMax[maxIndex]}
                 tipFormatter={tipFormatter}
                 marks={marks}
@@ -335,6 +346,7 @@ export default function RangeFilterPlugin(props: PluginFilterRangeProps) {
                 validateStatus={filterState.validateStatus}
                 min={min}
                 max={max}
+                step={step}
                 value={minMax[minIndex]}
                 tipFormatter={tipFormatter}
                 marks={marks}
@@ -346,6 +358,7 @@ export default function RangeFilterPlugin(props: PluginFilterRangeProps) {
               <AntdSlider
                 min={min}
                 max={max}
+                step={step}
                 included={false}
                 value={minMax[minIndex]}
                 tipFormatter={tipFormatter}
@@ -359,6 +372,7 @@ export default function RangeFilterPlugin(props: PluginFilterRangeProps) {
                 range
                 min={min}
                 max={max}
+                step={step}
                 value={minMax}
                 onAfterChange={handleAfterChange}
                 onChange={handleChange}