Use angular primitives to toggle

ui/src/app/app.component.ts

@@ -19,6 +19,7 @@ export class AppComponent implements AfterViewInit {
   quality: string;
   format: string;
   addInProgress = false;
+  showFolderDropdown = false;
   darkMode: boolean;
 
   @ViewChild('queueMasterCheckbox') queueMasterCheckbox: MasterCheckboxComponent;
@@ -114,6 +115,10 @@ export class AppComponent implements AfterViewInit {
     this.quality = exists ? this.quality : 'best'
   }
 
+  clickFolderDropdown() {
+    this.showFolderDropdown = !this.showFolderDropdown;
+  }
+
   addDownload(url?: string, quality?: string, format?: string) {
     url = url ?? this.addUrl
     quality = quality ?? this.quality