Extensions dialog's close button can be rendered off screen

Hi @jessebaker, could you please provide the steps to reproduce this issue?
Once they're available, I'll assign the issue to myself and begin working on it.

Thanks @libbna for your offer of helping. I had actually already done most of the work when I created this issue so I've got an MR already. My bad for not assigning it to myself when I created it.

I have reviewed the MR & the extension dialog is looking good to me. I have added before and after screenshots.

NOTE: from the dev tools I have increased the height check the scroll bar.

Some visual regressions for the other dialogs should get addressed

I'm afraid I don't remember why I added the min-height to the dialogs. I have removed it and everything seems to be working find so I'm going to chalk it up to me trying something that I later backed out of but forgot to remove.