[winrid]

This is what I mean: http://imgur.com/a/hY9eM77

Content size doesn't change in my case and I would highly advise against changing the sizing of elements on the page for something like this.

The buttons are sized vertical based on the content up to a limit.

[gindely]

Yep okay, so I guess that's not inline by my definition (since it overlays the text). I have definitely seen webpages that change the size of the containing box to add in the confirmation message and buttons.

I guess it's an between case I didn't consider - it's maybe not modal with respect to the whole app, but it seems to be modal with respect to that one comment (you can ignore it and do something else with the rest of the program, but with that comment, you can't even read it).