When cancelling a message an alert is shown for confirmation. In my opinion, this is annoying and ruins the smooth experience because I have to move the cursor to the top. Someone might also block further alerts by mistake.
Another place where is an alert is the rename option, the keyboard should focus on title and allow editing. Much better yet, hovering on the title should show a "Click to rename" tooltip and allow editing when clicked by someone with access.
A modal box over the posting form could be a much better solution.