OO-2871: allow the hotspot interaction to be responsive on small screen, allow the author to resize the background images

OO-2868 improve copy/paste links by wrapping them in an input field for proper selection without trailing whitespace

OO-2488: enhance the rich text editor to have 3 levels of representation: one line, multi-line and formatted, set the one line option for the single and multiple choices answers in the editor for QTI 2.1

OO-2895 add css class to all file elements and hide error icon that clashes with file element chooser

OO-2803: separate the video from the table, remove the list in editor which duplicate the data model, rewrite the validation of chapter, drive the video per javascript command and not per reload of the video...

OO-2830 fix several bugs in members display code, bring back configurable user properties context, also for avatar view

OO-2732 beautify d&d question type, use color coding and border styles to distinguish between source and target

OO-2784 optimize sections, add item id (hidden), compile offline files for download, beautify coach comment

OO-2790: implement persistence of panel open/close for QTI 2.1 and comment, disclaimer, results and asssessment documents

OO-2732: implement a matchInteraction with drag and drop (fallback to click possible) with slightly enhanced editor and word export

OO-2636: add print view in different places, add location and teachers in the table for teachers, implement "absence are default authorized"...

OO-2756	: add progress bar and percent value for score, add section summary for the questions correct, answered, and not answered