Display the property pretty name when showing the changes of a document's objects

Steps to reproduce:

• edit a property for document with objects (e.g. go to your user profile, click Edit, change your last name and save)
• go to the history tab and compare the last 2 versions of the document
• the comparison table displays in the Property column the name of the property instead of the pretty name(e.g. instead of Last Name you have last_name)

This is not user friendly and can be confusing.