Don't close the edit panel if the user write and select a Latex formula,
a link or a special character

sometimes did not work properly

Remove the editor if the user click out of the content editor, fix the
2px left margin in edit mode, fix a RELOAD by editing a fragment

Add a container element for portfolio pages and surveys which support
drag and drop of element in and out, up-to four columns, and container
in container. Fix some issues with drag and drop.

OO-3307: update d3.js to version 4.13.0, update charts in portfolio, QTI statistics and course statistics

OO-3294	: remove some specific IE 7 and 8 hacks or specific javascript libraries, update jQuery to 3.3.1

OO-2985: scroll to the warning message if someone want to delete its work in the drawing interaction

OO-2329: always show all axis in radar chart, better layouting of the steps labels, wording, anonym in segment view and in comparison charts...

OO-2368: better handle the behavior of the paint app if the mouse go out of the canvas, prevent IE to drag the background image which breaks the paint app...