Re-add debug button in AJAX errors #1687
Removed in 64686ef for Beta 8.
However, this is a much easier method of debugging for support requests, and does not force users to learn a new UI (web/dev tools in browser) or parse which errors in log files are relevant immediately.
I suggest restoring it for future versions.
maybe promote issues like these on a dev diary: https://discuss.flarum.org/d/20605-dev-diary-beta-10