Typing a character that causes horiz scrollbar to appear doesn't scroll up

[njx]

1. Open http://codemirror.net/demo/fullscreen.html
2. Go to the last line of the file
3. Type a bunch of characters until you get to the right edge

Result: When you type the character that makes the horizontal scrollbar appear, the editor doesn't scroll up, so the character is underneath the scrollbar. Typing another character makes it scroll to cursor properly.

[njx]

Found this while testing my scrolling changes (they exhibit the same bug, which maybe is a good sign that the changes haven't disrupted the overall logic too much :))

[marijnh]

Will your changes help here, since they also touch the scrolling-and-updating order?

[njx]

No, the bug still occurs with my changes. I haven't debugged into it to figure out where the problem is.