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/services/connection/browser/connectionDialogWidget.ts

@@ -163,7 +163,8 @@ export class ConnectionDialogWidget extends Modal {
 				render: c => {
 					c.append(recentConnectionTab);
 				},
-				layout: () => { }
+				layout: () => { },
+				focus: () => this._recentConnectionTree.domFocus()
 			}
 		});
 
@@ -174,7 +175,8 @@ export class ConnectionDialogWidget extends Modal {
 				layout: () => { },
 				render: c => {
 					c.append(savedConnectionTab);
-				}
+				},
+				focus: () => this._savedConnectionTree.domFocus()
 			}
 		});