Right now im having the time of my life deleteing a dead tracker from my 400 seeds /s
would be amazing to be able to mass edit trackers for a selection of torrents.
It woud be even better to have an automated system that deletes trackers on certain configurable error conditions or after x number of timeouts and writes tracker stats to a log

go to the transfers->trackers section of the settings. add the trackers you want to delete to the skip announce section. and add it to the remove from new section so it will not be added to new torrents.
also look at the advanced options section for some other options.