Comment lost when switching diff views #689

When I'm reviewing a PR, I like to switch between the entire Diff and the Interdiff for later rounds to build a more coherent picture of the changes. Unfortunately there seems to be a bug that when you switch between these two views, any text in the "comment" field is deleted. So if I'm in the middle of writing a comment, I need to copy it, switch to the other view, and then paste again.