[Qt-creator] Standard (ISO 6801) date/time format in Qt Designer's Property Editor values

[Bruno Pennati]

Hi,
   this is my first post.
I'm using qt designer 4.8.6 under Lubuntu.
I'd like to have the Property Editor show the date/time/dateTime etc. 
properties' values in a sane format, like ISO 8601. I'm not talking about 
the finished application, I'm not talking about the displayFormat property; 
I mean during development. It doesn't look like it's a matter of locale 
settings.

Image of a nice-looking app, bad-looking Property Editor and locale information
http://oi57.tinypic.com/od5xs.jpg

Is there a way to set the format used in the Property Editor to show the 
date/time/dateTime properties' values?
Thank you for your attention, have a nice day :)
-- 
Bruno Pennati