This ensures that double click to adjust content size on
headers doesn't end up eliding text. We also added
significantly more space by default.

Change-Id: I05a05649a41ef4b70ee839195a87c684786760b1
Reviewed-by: J-P Nurmi <jpnurmi@digia.com>
Reviewed-by: Gabriel de Dietrich <gabriel.dedietrich@digia.com>