UX: Mobile styling for discard draft modal buttons (PR #12735)

Before:

After:

image

GitHub

.discard-draft-modal {
  .modal-inner-container {
    width: 250px;
  }

Centering with different button widths feels a little hectic, maybe a narrower modal width full width buttons? Left a little extra width in there for other languages.

Screen Shot 2021-04-16 at 10 14 45 PM

    align-items: stretch;
    
    .btn {
      margin-right: 0;
    }
  }

That’s much better, thanks @awesomerobot!