feat(MultiSelect): add the clearSearchOnSelect option to enable clearing the current search when selecting an item

Author: mrholek

js/src/multi-select.js

@@ -85,6 +85,7 @@ const CLASS_NAME_TAG_DELETE = 'form-multi-select-tag-delete'
 const Default = {
   ariaCleanerLabel: 'Clear all selections',
   cleaner: true,
+  clearSearchOnSelect: false,
   container: false,
   disabled: false,
   invalid: false,
@@ -108,6 +109,7 @@ const Default = {
 const DefaultType = {
   ariaCleanerLabel: 'string',
   cleaner: 'boolean',
+  clearSearchOnSelect: 'boolean',
   container: '(string|element|boolean)',
   disabled: 'boolean',
   invalid: 'boolean',
@@ -755,6 +757,12 @@ class MultiSelect extends BaseComponent {
       this.search('')
       this._searchElement.value = null
     }
+
+    if (this._config.clearSearchOnSelect && this._config.search) {
+      this.search('')
+      this._searchElement.value = null
+      this._searchElement.focus()
+    }
   }
 
   _findOptionByValue(value, options = this._options) {