This fix ensures help text in empty lists displays with the intended formatting instead of showing raw or broken HTML. It improves the clarity of guidance shown to users when no records are available.

Some cases require usage of Markup in order to correctly display HTML content and avoid escaped or invalid statements.

Task-3074357

This change refreshes internal performance test expectations for appointment, discussion, and mail features to match the current system baseline. It helps teams more reliably detect future performance changes without affecting day-to-day users.

…counters

Update to current runbot state, in order to better spot changes potentially introduced with this PR.

Task-2710804 (Mail: Clean MailThread API)