fixup! fix(cdk/menu): update docs to reflect current implementation and add correct role for triggers

Author: mmalerba

src/cdk/menu/menu-item-checkbox.ts

@@ -19,6 +19,7 @@ import {CdkMenuItem} from './menu-item';
   exportAs: 'cdkMenuItemCheckbox',
   host: {
     'role': 'menuitemcheckbox',
+    '[class.cdk-menu-item-checkbox]': 'true',
   },
   providers: [
     {provide: CdkMenuItemSelectable, useExisting: CdkMenuItemCheckbox},

src/cdk/menu/menu-item-radio.ts

@@ -29,6 +29,7 @@ let nextId = 0;
   exportAs: 'cdkMenuItemRadio',
   host: {
     'role': 'menuitemradio',
+    '[class.cdk-menu-item-radio]': 'true',
   },
   providers: [
     {provide: CdkMenuItemSelectable, useExisting: CdkMenuItemRadio},

src/cdk/menu/menu.md

@@ -26,32 +26,18 @@ make any assumptions about how elements should be styled. You are expected to ap
 CSS styles, but the directives do apply CSS classes to make it easier for you to add custom styles.
 The available CSS classes are listed below, by directive.
 
-#### `cdkMenu`
-
-`cdk-menu`
-: Always applied
-`cdk-menu-inline`
-: Applied if the menu is an [inline menu](#menu-content)
-
-#### `cdkMenuBar`
-
-`cdk-menu-bar`
-: Always applied
-
-#### `cdkMenuGroup`
-
-`cdk-menu-group`
-: Always applied
-
-#### `cdkMenuItem`
-
-`cdk-menu-item`
-: Always applied
-
-#### `cdkMenuTriggerFor`
-
-`cdk-menu-trigger`
-: Always applied
+| Directive             | CSS Class                | Applied...                                     |
+|:----------------------|--------------------------|------------------------------------------------|
+| `cdkMenu`             | `cdk-menu`               | Always                                         |
+| `cdkMenu`             | `cdk-menu-inline`        | If the menu is an [inline menu](#menu-content) |
+| `cdkMenuBar`          | `cdk-menu-bar`           | Always                                         |
+| `cdkMenuGroup`        | `cdk-menu-group`         | Always                                         |
+| `cdkMenuItem`         | `cdk-menu-item`          | Always                                         |
+| `cdkMenuItemCheckbox` | `cdk-menu-item`          | Always                                         |
+| `cdkMenuItemCheckbox` | `cdk-menu-item-checkbox` | Always                                         |
+| `cdkMenuItemRadio`    | `cdk-menu-item`          | Always                                         |
+| `cdkMenuItemRadio`    | `cdk-menu-item-radio`    | Always                                         |
+| `cdkMenuTriggerFor`   | `cdk-menu-trigger`       | Always                                         |
 
 ### Getting started