docs: add onlineHelp to some panels

name sections according to the title or content and add
the respective onlineHelp to the following panels:
- datastore
- user management
- ACL
- backup remote

Signed-off-by: Oguz Bektas <o.bektas@proxmox.com>
Reviewed-By: Dominik Csapak <d.csapak@proxmox.com>
Tested-By: Dominik Csapak <d.csapak@proxmox.com>

www/window/DataStoreEdit.js

@@ -3,6 +3,9 @@ Ext.define('PBS.DataStoreEdit', {
     alias: 'widget.pbsDataStoreEdit',
     mixins: ['Proxmox.Mixin.CBind'],
 
+
+    onlineHelp: 'datastore_intro',
+
     subject: gettext('Datastore'),
     isAdd: true,