Hi all,
I could not find a rating field for 4.1, so, here is one :

example page: http://bl.ocks.org/2785050
source:
https://github.com/krikrou/Ext.ux.widget.Rating

Features:
- it extends Ext.form.field.Number, so it is a real field (set/getValue, error message, validation, ... are available)
- reset button,
- setvalue with arrows on focus,
- split stars to allow gradual selection.

Screenshot.png

Cheers,
C.