localize strings, use category property. fyi @rebornix

src/vs/workbench/contrib/notebook/browser/contrib/fold/folding.ts

@@ -17,6 +17,7 @@ import { KeybindingWeight } from 'vs/platform/keybinding/common/keybindingsRegis
 import { ServicesAccessor } from 'vs/platform/instantiation/common/instantiation';
 import { IEditorService } from 'vs/workbench/services/editor/common/editorService';
 import { getActiveNotebookEditor } from 'vs/workbench/contrib/notebook/browser/contrib/coreActions';
+import { localize } from 'vs/nls';
 
 export class FoldingController extends Disposable implements INotebookEditorContribution {
 	static id: string = 'workbench.notebook.findController';
@@ -133,7 +134,8 @@ registerAction2(class extends Action2 {
 	constructor() {
 		super({
 			id: 'notebook.fold',
-			title: 'Notebook Fold Cell',
+			title: localize('fold.cell', 'Fold Cell'),
+			category: localize('cat', "Notebook"),
 			keybinding: {
 				when: ContextKeyExpr.and(NOTEBOOK_EDITOR_FOCUSED, ContextKeyExpr.not(InputFocusedContextKey)),
 				primary: KeyCode.LeftArrow,
@@ -170,7 +172,8 @@ registerAction2(class extends Action2 {
 	constructor() {
 		super({
 			id: 'notebook.unfold',
-			title: 'Notebook Unfold Cell',
+			title: localize('unfold.cell', 'Unfold Cell'),
+			category: localize('cat', "Notebook"),
 			keybinding: {
 				when: ContextKeyExpr.and(NOTEBOOK_EDITOR_FOCUSED, ContextKeyExpr.not(InputFocusedContextKey)),
 				primary: KeyCode.RightArrow,