ui: ACL edit: set default focus on a non-combobox element

to avoid making it "jump" in the users face by immediately opening
the picker on window open.

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

www/window/ACLEdit.js

@@ -13,6 +13,7 @@ Ext.define('PBS.window.ACLEdit', {
 
     // caller can give a static path
     path: undefined,
+    defaultFocus: 'proxmoxcheckbox',
 
     initComponent: function() {
 	let me = this;