ui: labelWidth gets px suffixed so auto won't work

This is a common mistake with widths in ExtJS, most of them have the
'px' unit implicit, so using things like 'auto' or '100%' does not
works with them.

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

www/manager6/window/Settings.js

@@ -225,7 +225,7 @@ Ext.define('PVE.window.Settings', {
 		    {
 			xtype: 'displayfield',
 			fieldLabel: gettext('Saved User Name:'),
-			labelWidth: 'auto',
+			labelWidth: '150',
 			stateId: 'login-username',
 			reference: 'savedUserName',
 			flex: 1,