Environment:

- OS: Windows 7 64bit
- ExtJs: 6.2.1
- Toolkit: classic

Issue: defaultFieldUI config property of Ext.toolbar.Paging is not appied to the "Page Number" field.

This happens due to the following Ext.toolbar.Paging way of "Page Number" field declaration:

...
// mark it as not a field so the form will not catch it when getting fields
isFormField: false,
...

and the following code of Ext.toolbar.Toolbar:

...
else if (component.isFormField) {
component.ui = isFooter ? me.defaultFooterFieldUI : me.defaultFieldUI;
}
...

It would be nice to have some config option in Ext.toolbar.Paging to control if "isFormField" set to "false" or not.