[Cuis] StringMorph and lf

[Dan]

Hi Juan,

One more tweak perhaps? ;) To see the problem...

Write approx. 120 lines, causing vScroll to appear. 
Move the slider to the bottom and leave it there.
Replace the lines with perhaps 2 dozen, which require no vScroll.
Unfortunately, the pane is blank and vScroll disappears.
The only(?) way to get back to the top is to make vScroll reappear by resizing.
(The lines mentioned are written by sending #actualContents: to the TextModel.)

Otherwise your changes are looking good. I'll open that issue you mentioned on GitHub.

Thanks,
 - Dan