New Feature:
Added a 'buttonstyle' parameter to the following shortcodes:
- [i4w_password_reset]
- [i4w_password_change]
- [i4w_password_send]
- [i4w_actionset]
- [i4w_minilogin]
This parameter has been added to these five shortcodes to enable style manipluation of button images and HTML buttons.