ui: namespace selector: set queryMode to local

to avoid that the comobox triggers automatic API request with the
queryParam default `query` GET param on manual typing (e.g., for
filtering) from the user, we have all data already loaded and locally
available.

https://docs.sencha.com/extjs/7.0.0/classic/Ext.form.field.ComboBox.html#cfg-queryMode

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

www/form/NamespaceSelector.js

@@ -27,6 +27,7 @@ Ext.define('PBS.form.NamespaceSelector', {
     editable: true,
     anyMatch: true,
     forceSelection: true,
+    queryMode: 'local',
 
     matchFieldWidth: false,
     listConfig: {