[ADF-2824] Added and reviewed some content services docs (#3385)

docs/content-services/node-permission-dialog.service.md

@@ -0,0 +1,36 @@
+---
+Added: v2.4.0
+Status: Active
+Last reviewed: 2018-05-23
+---
+
+# Node permission dialog service
+
+Displays dialogs to let the user set node permissions.
+
+## Class members
+
+### Methods
+
+-   **close**()<br/>
+    Closes the currently-open dialog.
+-   **openAddPermissionDialog**(nodeId: `string` = `null`, title?: `string` = `null`): `Observable<MinimalNodeEntity[]>`<br/>
+    Opens a dialog to add permissions to a node.
+    -   _nodeId:_ `string`  - ID of the target node
+    -   _title:_ `string`  - (Optional)Dialog title
+    -   **Returns** `Observable<MinimalNodeEntity[]>` - Node with updated permissions
+-   **updateNodePermissionByDialog**(nodeId?: `string` = `null`, title?: `string` = `null`): `Observable<MinimalNodeEntryEntity>`<br/>
+    Opens a dialog to update permissions for a node.
+    -   _nodeId:_ `string`  - (Optional)ID of the target node
+    -   _title:_ `string`  - (Optional)Dialog title
+    -   **Returns** `Observable<MinimalNodeEntryEntity>` - Node with updated permissions
+
+## Details
+
+This service sets up an [Add Permission Dialog component](../content-services/add-permission-dialog.component.md) to provide a user
+interface for updating permissions. 
+
+## See also
+
+-   [Node Permission service](node-permission.service.md)
+-   [Add Permission Dialog component](add-permission-dialog.component.md)