window: ldap auth edit: avoid relying on the default bind property

When using a string as bind config ExtJS maps this to the property
defined by the components defaultBindProperty, which is a bit to
subtle for my taste.

Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>

src/window/AuthEditLDAP.js

@@ -92,7 +92,9 @@ Ext.define('Proxmox.panel.LDAPInputPanel', {
 	    xtype: 'proxmoxcheckbox',
 	    fieldLabel: gettext('Anonymous Search'),
 	    name: 'anonymous_search',
-	    bind: '{anonymous_search}',
+	    bind: {
+		value: '{anonymous_search}',
+	    },
 	},
 	{
 	    xtype: 'proxmoxtextfield',