fix(MultiSelect): allow changing counter text because the selectionTypeCounterText option doesn't work

Author: mrholek

js/src/multi-select.js

@@ -890,7 +890,7 @@ class MultiSelect extends BaseComponent {
     }
 
     if (this._config.multiple && this._config.selectionType === 'counter') {
-      this._searchElement.placeholder = `${this._selected.length} item(s) selected`
+      this._searchElement.placeholder = `${this._selected.length} ${this._config.selectionTypeCounterText}`
     }
   }