improve appearance of tile id decoration
improve appearance of tile id decoration

* reduce font size to 12pt
* make the font non-bold

svn path=/trunk/KDE/kdeedu/marble/; revision=1206119

probonopd/marble,David-Gil/marble-dev,tucnak/marble,David-Gil/marble-dev,quannt24/marble,tzapzoor/marble,oberluz/marble,quannt24/marble,probonopd/marble,adraghici/marble,utkuaydin/marble,oberluz/marble,adraghici/marble,tzapzoor/marble,rku/marble,Earthwings/marble,oberluz/marble,David-Gil/marble-dev,AndreiDuma/marble,adraghici/marble,quannt24/marble,quannt24/marble,adraghici/marble,rku/marble,tzapzoor/marble,oberluz/marble,utkuaydin/marble,rku/marble,Earthwings/marble,rku/marble,tucnak/marble,probonopd/marble,tucnak/marble,AndreiDuma/marble,AndreiDuma/marble,adraghici/marble,tucnak/marble,tzapzoor/marble,utkuaydin/marble,adraghici/marble,tucnak/marble,tucnak/marble,rku/marble,probonopd/marble,probonopd/marble,oberluz/marble,tzapzoor/marble,quannt24/marble,AndreiDuma/marble,quannt24/marble,AndreiDuma/marble,quannt24/marble,oberluz/marble,David-Gil/marble-dev,tzapzoor/marble,rku/marble,probonopd/marble,utkuaydin/marble,Earthwings/marble,utkuaydin/marble,utkuaydin/marble,tzapzoor/marble,AndreiDuma/marble,probonopd/marble,Earthwings/marble,Earthwings/marble,David-Gil/marble-dev,David-Gil/marble-dev,tucnak/marble,Earthwings/marble,tzapzoor/marble