If setting images for items in QRadioElement, 
display them in QRadioItemElement.
Merge pull request #638 from bvirlet/master

Improve us of images in QRadioElement
Merge branch 'master' of https://github.com/escoz/QuickDialog

# By Bruno Virlet
# Via Bruno Virlet (1) and Eduardo Scoz (1)
* 'master' of https://github.com/escoz/QuickDialog:
  If setting images for items in QRadioElement, display them in QRadioItemElement.