Merge branch 'release/v0.4.18' into develop
fix display of push box  in user overview
proper width for email ace editor
human readable time in results
iron out some more kinks with js-hidden items
allow longer knitr reports and don't fail hard if they can't be stored in the DB
docs
sessions expire less early by default. we keep unregistered sessions (can't be regained) the longest, we can also set up different expiries for users and admins.
fixes #48
better error message when run landing page is missing.
composer update
Merge branch 'release/v0.4.19'