Infobars for an error in a document: don't suppot well small screen sizes
This is how it looks currently (see especially the buttons inside the infobar):
Another example:
It's very easy to change the orientation of the buttons: instead of being packed horizontally, they can be packed vertically. As in:
Ideally infobars should be fully responsive, adapting automatically to the screen size, but it's much more work. A low-hanging fruit is to always pack the buttons vertically in infobars.
What do you think?