the same as typing t fcbf9ed0 modify project:… due:… …. an empty box clears that field.
this is a demo. the data is invented, it is shared with everyone else looking, and it is wiped every night. don't put anything real in it. what is this?
$ tracker fcbf9ed0-c8db-4a95-90a9-49d00ee708a1 e