Gracefully handle marking a project deletion multiple times
If a user clicks on "Delete repository" on a project that has already
been marked for deletion, GitLab would previously throw a 500 Error due
to NoMethodError: undefined method '[]' for nil:NilClass. To fix this,
return a successful mark so that the user can see when the project is
slated for deletion.
Closes #121730 (closed)
Edited by Stan Hu