* Changed BStringItem::Update() to set a better baseline offset and height;
this should improve vertical text placement.
* Fixed a bug in BStringItem::Update(): it used the owner to determine the
width, but must use the font passed in instead.
* Coding style cleanup.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31090 a95241bf-73f2-0310-859d-f6bbb57e9c96