fix: only set date/number facets selected if values have changed

For displaying the badge, we need to know when custom values have
been set. Also, this prevent useless facet checks when user has
changed one value then changed it back to default.

umap/static/umap/js/umap.forms.js

@@ -843,11 +843,22 @@ L.FormBuilder.MinMaxBase = L.FormBuilder.Element.extend({
   },
 
   toJS: function () {
-    return {
+    const opts = {
       type: this.type,
-      min: this.minInput.value,
-      max: this.maxInput.value,
     }
+    if (
+      this.minInput.value !== '' &&
+      this.minInput.value !== this.minInput.dataset.value
+    ) {
+      opts.min = this.minInput.value
+    }
+    if (
+      this.maxInput.value !== '' &&
+      this.maxInput.value !== this.maxInput.dataset.value
+    ) {
+      opts.max = this.maxInput.value
+    }
+    return opts
   },
 })