tasks #7407 Add option to display time in date field

This task is part of story #7161 Create a date-time field

A new checkbox is added in FromElement_Date admin form in ordrer to select
if we want to display the time of dates

Change-Id: I62cd16324deac08ad9c2fd8fe949677d8138b9c5
Merge commit 'refs/changes/55/2955/6' of ssh://gerrit.tuleap.net:29418/tuleap into HEAD

* ssh://gerrit.tuleap.net:29418/tuleap:
  tasks #7407 Add option to display time in date field

Change-Id: I219256e446b44655d2b8a9ab9dfdcee8f901a09f
This is Tuleap 7.4.99.13

Change-Id: I553f29992511f168205b3023884c9bcc3a45aa59