OO-1140, OO-1138: remove one red x in course list if course is failed, add per default the number of rows in flexi tables, fix group by in coaching views for older version of PostgreSQL

OO-1000: fix an issue with the edition of coach role of course, fix some issues with the views of the coaching tool

OO-1000: preserve the creation date and last modified date of the security group membership during update, fields use as first access and last access in groups

OO-1068: fix flow of QTI choice questions, fix missing end div in choice questions, fix missing chat icon in visit card, fix missing list of owners in repository entry details

OO-1124: don't fix the width of disabled rich text and align it, better contrast of disabled primary button, simplify DOM tree of the contact form...

OO-1068: fix RS in user settings if the charset of the user is not in the list of the available ones

no-jira: small workaround if a single page with video come from another server with an other context

OO-1068:  extended search always open in search tab, share link with title, escape in delegate of flexi cell renderer

OO-990: add more tools to the toolbar in the details part of the authoring tool, jump to the list if a resource is deleted...

OO-1068:  bootstrapify the stepped wizard and the legacy wizard with a style based on the very good Fuel UX wizard