Add new date time field

Change-Id: I1d265d5e09569acb0a0ad0872ec73548f02cce7f
Align date picker in tuleap-modal

Change-Id: Ie5409d0a409e86cc9838c23aa05849cc91c25f6c
Burndown field is too big in IE

Change-Id: I8d947bb8715f77643b30f835408b0b02e0b47444
Merge remote-tracking branch 'gerrit/6058_create_stuff_using_modal' into HEAD

* gerrit/6058_create_stuff_using_modal:
  Burndown field is too big in IE
  Align date picker in tuleap-modal
  Add new date time field

Conflicts:
	src/www/themes/Experimental/ChangeLog
	src/www/themes/Experimental/VERSION

Change-Id: I7e4a433ffe2c84b6ec07c4626464e8579a775c68
This is Tuleap 6.10.99.10

Change-Id: I0938eb76074a7967ef5776a4aa6a084de79ea702