Data explorer/context menu initial (#6264)

* fixed context for data explorer

* added more files

* initial servers and database context menu actions finished

* added all actions for servers and databases with correct conditions

* added nodetype and nodelabel for subtype actions

* added nodeinfo logic to oe shim

* fixed context for cms

* added all scripting actions to data explorer

* review comments

* fix import

* fix correct context key

* removed unused import

* separate PR for commands and menus added

* rename mssql context menu nodes

* remove command id constants

src/sql/workbench/parts/dataExplorer/browser/dataExplorerViewlet.ts

@@ -112,6 +112,7 @@ export class DataExplorerViewlet extends ViewContainerViewlet {
 				actions.push(...group[1]);
 			}
 		});
+		menu.dispose();
 		return actions;
 	}