* ci: Also check generated HTML with the "vnu" validator
Because HTML Tidy apparently misses a bunch of errors.
* thead -> tbody
* More fixes
* More fixes
* Start checker in test runner
Do not allow editing or submitting new session requests when the tool is locked. Fixes Ticket #1443.
- Legacy-Id: 8391
Note: SVN reference [8156] has been migrated to Git commit f9d614528b
Note: SVN reference [8320] has been migrated to Git commit faa6469e27