fix setting value

Author: GrabowskiM

src/bundle/Resources/public/ts/components/dropdown/dropdown_multi_input.ts

@@ -16,7 +16,7 @@ export class DropdownMultiInput extends BaseDropdown {
         const _sourceInputNode = this._sourceNode.querySelector<HTMLSelectElement>('select');
 
         if (!_sourceInputNode) {
-            throw new Error('DropdownSingleInput: Required elements are missing in the container.');
+            throw new Error('DropdownMultiInput: Required elements are missing in the container.');
         }
 
         this._sourceInputNode = _sourceInputNode;
@@ -51,7 +51,7 @@ export class DropdownMultiInput extends BaseDropdown {
             this._sourceInputNode.appendChild(option);
         });
 
-        this.setValue(this._sourceInputNode.value);
+        this.setValues(this.getSelectedValuesFromSource());
     }
 
     protected setSourceValue(id: string, actionPerformed: DropdownMultiInputAction) {
@@ -108,7 +108,11 @@ export class DropdownMultiInput extends BaseDropdown {
 
         this._value = [];
 
-        tempValue.forEach((value) => {
+        this.setValues(tempValue);
+    }
+
+    public setValues(values: string[]) {
+        values.forEach((value) => {
             this.setValue(value);
         });
     }