[WIP] EZP-21826: As an editor, I want to be able to fill date, date and time and time fields while editing a content

  :warning: Work in progress ! :warning: 
## Description

Here is the pull request about being able to fill Date, Time, DateAndTime fields in the edit part of the platformUI. Currently it's only working for the browser supporting date and time HTML5 inputs ( basically Chrome, Opera, Safari ...). 

## Screenshots

Soon available

## Link

Jira : https://jira.ez.no/browse/EZP-21826
  :warning: Work in progress ! :warning: 
this class seems useless