OO-1856: fix select all + click on pageing, next and previous beahvior on old table implementation to mimic 10.3

FXOLAT-504: missing i18n key, beautify the publication date in metadata of file, some changes in ful text search...

OO-1635: do afterserver in finally, fix some issues in selenium, make some changes to stream line the gatling tests ...

OO-1770, OO-1769: allow pseudonym and guest posts, refactor the message model to hold only threads or messages of a unique thread in memory, minimize the number of joins on query, minimize the number of queries on peekview, remove buggy docking feature...

OO-1658 implement HelpTooltip componente to use the new form context help also outside of the form context

OO-1645: the internal links must close the callout window after being clicked, fix order for the CalendarKey

OO-1741 remove ? from dummy avatar images, adding anonymous avatar and removing old avatar images outside the theme

OO-1739: backport the delete button in file element and use it in user profil for the avatar, in the resource description and in the catalog entry editor

no-jira: beautify the list of sub levels in the catalog if the number of levels is uneven and the view of type list