Show comments from all revisions

[gsaslis]

In the timeline, I can see comments from all revisions.

But when reviewing the diff, I can't see comments from non-latest revision. This has the problem that when adding a new commit e.g. to fix one of the inline comments, I can no longer see the comment (even if the commit changed an unrelated line).

Cases:

• a comment is left on a line that is not changed in a subsequent revision (the diff remains the same)
• a comment is left on a line that is later changed in a following commit
• a comment is left on a line in a file that is later deleted
• a comment is left on a line in a file that is renamed
• a comment is edited