Add focus logic to the tabbed panel (#5649)

* add focus logic to the tabbed panel

* change enter to be on key up

* fix  tests

src/sql/workbench/parts/queryPlan/browser/topOperations.ts

@@ -89,6 +89,10 @@ export class TopOperationsView implements IPanelView {
 		this.table.layout(dimension);
 	}
 
+	public focus(): void {
+		this.table.focus();
+	}
+
 	public clear() {
 		this.dataView.clear();
 	}