stop duplicating actions for tabs management when using macOS native tabs (#59793)

src/vs/code/electron-main/menus.ts

@@ -969,14 +969,14 @@ export class CodeMenu {
 
 		const nativeTabMenuItems: Electron.MenuItem[] = [];
 		if (this.currentEnableNativeTabs) {
+			nativeTabMenuItems.push(__separator__());
+
 			nativeTabMenuItems.push(this.createMenuItem(nls.localize('mNewTab', "New Tab"), 'workbench.action.newWindowTab'));
 
 			nativeTabMenuItems.push(this.createRoleMenuItem(nls.localize('mShowPreviousTab', "Show Previous Tab"), 'workbench.action.showPreviousWindowTab', 'selectPreviousTab'));
 			nativeTabMenuItems.push(this.createRoleMenuItem(nls.localize('mShowNextTab', "Show Next Tab"), 'workbench.action.showNextWindowTab', 'selectNextTab'));
 			nativeTabMenuItems.push(this.createRoleMenuItem(nls.localize('mMoveTabToNewWindow', "Move Tab to New Window"), 'workbench.action.moveWindowTabToNewWindow', 'moveTabToNewWindow'));
 			nativeTabMenuItems.push(this.createRoleMenuItem(nls.localize('mMergeAllWindows', "Merge All Windows"), 'workbench.action.mergeAllWindowTabs', 'mergeAllWindows'));
-
-			nativeTabMenuItems.push(__separator__(), ...nativeTabMenuItems);
 		}
 
 		[

src/vs/platform/menubar/electron-main/menubar.ts

@@ -588,14 +588,14 @@ export class Menubar {
 
 		const nativeTabMenuItems: Electron.MenuItem[] = [];
 		if (this.currentEnableNativeTabs) {
+			nativeTabMenuItems.push(__separator__());
+
 			nativeTabMenuItems.push(this.createMenuItem(nls.localize('mNewTab', "New Tab"), 'workbench.action.newWindowTab'));
 
 			nativeTabMenuItems.push(this.createRoleMenuItem(nls.localize('mShowPreviousTab', "Show Previous Tab"), 'workbench.action.showPreviousWindowTab', 'selectPreviousTab'));
 			nativeTabMenuItems.push(this.createRoleMenuItem(nls.localize('mShowNextTab', "Show Next Tab"), 'workbench.action.showNextWindowTab', 'selectNextTab'));
 			nativeTabMenuItems.push(this.createRoleMenuItem(nls.localize('mMoveTabToNewWindow', "Move Tab to New Window"), 'workbench.action.moveWindowTabToNewWindow', 'moveTabToNewWindow'));
 			nativeTabMenuItems.push(this.createRoleMenuItem(nls.localize('mMergeAllWindows', "Merge All Windows"), 'workbench.action.mergeAllWindowTabs', 'mergeAllWindows'));
-
-			nativeTabMenuItems.push(__separator__(), ...nativeTabMenuItems);
 		}
 
 		[