Bind Save All to Alt+Ctrl+S (fixes #11433)

src/vs/workbench/parts/files/browser/fileActions.contribution.ts

@@ -163,7 +163,7 @@ const category = nls.localize('filesCategory', "Files");
 
 const registry = Registry.as<IWorkbenchActionRegistry>(ActionExtensions.WorkbenchActions);
 registry.registerWorkbenchAction(new SyncActionDescriptor(SaveFileAction, SaveFileAction.ID, SaveFileAction.LABEL, { primary: KeyMod.CtrlCmd | KeyCode.KEY_S }), 'Files: Save', category);
-registry.registerWorkbenchAction(new SyncActionDescriptor(SaveAllAction, SaveAllAction.ID, SaveAllAction.LABEL), 'Files: Save All', category);
+registry.registerWorkbenchAction(new SyncActionDescriptor(SaveAllAction, SaveAllAction.ID, SaveAllAction.LABEL, { primary: KeyMod.CtrlCmd | KeyMod.Alt | KeyCode.KEY_S }), 'Files: Save All', category);
 registry.registerWorkbenchAction(new SyncActionDescriptor(SaveFilesAction, SaveFilesAction.ID, null /* only for programmatic trigger */), null);
 registry.registerWorkbenchAction(new SyncActionDescriptor(RevertFileAction, RevertFileAction.ID, RevertFileAction.LABEL), 'Files: Revert File', category);
 registry.registerWorkbenchAction(new SyncActionDescriptor(GlobalNewFileAction, GlobalNewFileAction.ID, GlobalNewFileAction.LABEL), 'Files: New File', category);