Comment on Commit while in Branch Diff View (BB-11607)

Sometimes I will be looking at a diff between branches and I will want to leave a comment on the code. However, I am unable to do so! I can only leave comments if I am on a diff for a commit.

It's annoying that I can't write comments from the branch diff. It means I have to take the time to find out which commit in the branch the code change I'm looking at, then find that line of code again, then write my comment.

When I'm doing a code review of a branch with a bunch of commits, I want to look at the branch diff page and leave comments on the changes. Bitbucket's code should automatically detect which commit and my comment belongs to and add it there. And show the comments on the branch diff. Right now, comments can only be created from the Commit Diff, not the Branch Diff.