allow database name to be empty (#20221)

* allow database to be empty

* test changes

* fix import

* fix test cases

* comment

src/sql/base/browser/ui/editableDropdown/browser/dropdown.ts

@@ -420,4 +420,8 @@ export class Dropdown extends Disposable implements IListVirtualDelegate<string>
 	public get selectList(): List<IDropdownListItem> {
 		return this._selectList;
 	}
+
+	public get options(): IDropdownOptions {
+		return this._options;
+	}
 }