fix scrolling out of area problems while draging text around
fix scrolling out of area problems while draging text around

svn path=/trunk/kdelibs/kate/; revision=340677

sandsmark/kate,jfmcarreira/kate,sandsmark/kate,jfmcarreira/kate,hlamer/kate,jfmcarreira/kate,hlamer/kate,sandsmark/kate,hlamer/kate,hlamer/kate,hlamer/kate,DickJ/kate,hlamer/kate,hlamer/kate,DickJ/kate,DickJ/kate,cmacq2/kate,hlamer/kate,cmacq2/kate,cmacq2/kate,sandsmark/kate,hlamer/kate,hlamer/kate,DickJ/kate