Fix height of "Submit Changes" textarea to it looks OK in chromium

This makes the textarea a few pixels lower which is enough to
prevent a scrollbar from appearing for the dialog client area.
It still looks good in FF nightly and Opera Next 12.50.
Fix height of "Create Comment" textarea to it looks OK in chromium

This makes the textarea a few pixels lower which is enough to
prevent a scrollbar from appearing for the dialog client area.
It still looks good in FF nightly and Opera Next 12.50.
Quirk to avoid vertical scrollbars for resized dialogs in chromium

Without this quirk the height of the textarea gets too large so that
a vertical scrollbar appears for the client area in the dialog. Both
the "Submit Changes" and "Create Comment" dialogs are affected.
Firefox and Opera did not have this problem.