Fixes referencing work packages in news
Fixes referencing work packages in forums
Respect sticky date in message order
Save sticky date if sticky is set
Respect sticky in default order
Add new colum sticked_on

Using data from this column will help us to put sticky messages on top of messages list
Add cuke
Reset sticky date when sticky option is reset
Fix sticky date set
Add specs
Merge branch 'bugfix/284_sticky_does_not_apply_to_forum' into dev
Adds changelog entry
Fix test
Fixes referencing work packages in news#show
don't rely on journal record id to find predecessor and use version instead
dropped redundant limit
Merge pull request #1036 from netfighter/bugfix/4040_referencing_work_packages
Adds changelog entry
Merge pull request #1039 from opf/fix/wrong_diff_on_first_wp_journal_entry_5322

Don't rely on journal record id to find predecessor and use version instead