Merge branch 'release/8.4'
Merge branch 'hotfix/7.4.1'
Merge branch 'hotfix/7.4.2'
Reduce number of database hits when sending mass e-mails
Add export function for event data
Fix bug in constructing the base search url in sadmin
Fix bug in filtering lines in the accounting report
Allow users to skip option selection if there are no options to select
Fix name clash
Add event visibility bit and add copy function for events
Bump version numbers
Merge branch 'release/8.5.0' into production