[geo] add controls for minRadiusPixels and maxRadiusPixels in deck_scatter (#4467)

superset/assets/javascripts/explore/stores/controls.jsx

@@ -1848,6 +1848,30 @@ export const controls = {
       'lower values are pruned first'),
   },
 
+  min_radius: {
+    type: 'TextControl',
+    label: t('Minimum Radius'),
+    isFloat: true,
+    validators: [v.nonEmpty],
+    renderTrigger: true,
+    default: 2,
+    description:
+    t('Minimum radius size of the circle, in pixels. As the zoom level changes, this ' +
+      'insures that the circle respects this minimum radius.'),
+  },
+
+  max_radius: {
+    type: 'TextControl',
+    label: t('Maximum Radius'),
+    isFloat: true,
+    validators: [v.nonEmpty],
+    renderTrigger: true,
+    default: 250,
+    description:
+    t('Maxium radius size of the circle, in pixels. As the zoom level changes, this ' +
+      'insures that the circle respects this maximum radius.'),
+  },
+
   partition_threshold: {
     type: 'TextControl',
     label: t('Partition Threshold'),

superset/assets/javascripts/explore/stores/visTypes.js

@@ -648,6 +648,7 @@ export const visTypes = {
         label: t('Point Size'),
         controlSetRows: [
           ['point_radius_fixed', 'point_unit'],
+          ['min_radius', 'max_radius'],
           ['multiplier', null],
         ],
       },