Wrong datePicker value when edit some date custom fields

You can replicate this bug in dmaster doing the following:

• Create a custom group in Contact and include one custom data type
• Edit a contact and set a date in this custom field. Important to set a date 4 or 5 years ago. For example: 01/01/2010
• Edit the custom field and set "Dates may be up to 1 years prior to current date".
• Go again to the contact and check the date. It has changed to 01/01/2016

I attach an image where you can see that the value of the custom field is correct (2010-07-22 in the img) but instead shows 01/01/2016.

That's caused by the option of the "Dates may be...".

It shouldn't change the dates already set, only the new ones.