ui: gc job edit: fix i18n gettext usage

String concatenating a variable with some static text as gettext
parameter cannot really work, and it also does not make sense to do
most of the time, as even if we'd use some overly generic format
string like '{0} (disabled)', it would be not easy to translate
correctly in all languages in such a generic way.

So just use the actual full string, which is already contained in our
translation catalogue anyway…

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

www/window/GCJobEdit.js

@@ -23,6 +23,6 @@ Ext.define('PBS.window.GCJobEdit', {
 	xtype: 'pbsCalendarEvent',
 	name: 'gc-schedule',
 	fieldLabel: gettext("GC Schedule"),
-	emptyText: gettext(Proxmox.Utils.NoneText + " (disabled)"),
+	emptyText: gettext('none (disabled)'),
     },
 });