Add border around issue history to prevent accidental deletion of an issue
In my observation, some users accidentally delete an issue trying to delete last note. The misoperation is probably caused by the current UI of Redmine. The delete button at the bottom of IssuesController#show page looks as if it is a button for delete the last note, but actually it is a button to deletes the issue.
Such misoperation can be prevented by making a slight change to UI. Please see the following screenshots. By adding border around issue history, it becomes clear that the button is not a button for deleting the note. Our company have succeeded in significantly reducing accidents that our customers mistakenly delete an issue by implementing the change.
The patch was extracted from farend basic theme.