Drop non-working link in user menu to project states.
Use select2 for comboboxes.
Add schema migrations for has_vcards
Update bootstrap rails gem.
Disable a few zeus commands.
Unify header with other CyT projects.
Use heigher boxes for overview parts.
Revert "Update bootstrap rails gem."

This reverts commit 11fae0a93db20381073a2488c5bb09527fc8684c.
Merge remote-tracking branch 'origin/staging'

rts commit 11fae0a93db20381073a2488c5bb09527fc8684c.