Add new in new window to Terminal menu

Fixes microsoft#259571

Author: Tyriar

src/vs/workbench/contrib/terminal/browser/terminalMenus.ts

@@ -48,6 +48,19 @@ export function setupTerminalMenus(): void {
 					order: 1
 				}
 			},
+			{
+				id: MenuId.MenubarTerminalMenu,
+				item: {
+					group: TerminalMenuBarGroup.Create,
+					command: {
+						id: TerminalCommandId.NewInNewWindow,
+						title: localize({ key: 'miNewInNewWindow', comment: ['&& denotes a mnemonic'] }, "New in New &&Window"),
+						precondition: ContextKeyExpr.has(TerminalContextKeyStrings.IsOpen)
+					},
+					order: 2,
+					when: TerminalContextKeys.processSupported
+				}
+			},
 			{
 				id: MenuId.MenubarTerminalMenu,
 				item: {