Data Explorer Disconnect and Error Handling (#4243)

* adding context

* apply extension changes

* shimming disconnect

* add data explorer context menu and add disconnect to it

* clean up shim code; better handle errors

* remove tpromise

* simplify code

src/vs/platform/actions/common/actions.ts

@@ -98,7 +98,8 @@ export const enum MenuId {
 	ViewTitle,
 	// {{SQL CARBON EDIT}}
 	ObjectExplorerItemContext,
-	NotebookToolbar
+	NotebookToolbar,
+	DataExplorerContext
 }
 
 export interface IMenuActionOptions {

src/vs/workbench/services/actions/electron-browser/menusExtensionPoint.ts

@@ -43,6 +43,7 @@ namespace schema {
 			// {{SQL CARBON EDIT}}
 			case 'objectExplorer/item/context': return MenuId.ObjectExplorerItemContext;
 			case 'notebook/toolbar': return MenuId.NotebookToolbar;
+			case 'dataExplorer/context': return MenuId.DataExplorerContext;
 		}
 
 		return void 0;