highlighting: emit sizeChanged on HL finish to update scrollbars. Fix enki bug 191
highlighting: emit sizeChanged on HL finish to update scrollbars. Fix enki bug 191

Aldenis2112/qutepart,Aldenis2112/qutepart,Aldenis2112/qutepart,andreikop/qutepart,Aldenis2112/qutepart,hlamer/qutepart,andreikop/qutepart,hlamer/qutepart,andreikop/qutepart,Aldenis2112/qutepart,hlamer/qutepart,Aldenis2112/qutepart,Aldenis2112/qutepart,andreikop/qutepart,andreikop/qutepart,andreikop/qutepart,hlamer/qutepart,andreikop/qutepart,hlamer/qutepart,hlamer/qutepart,hlamer/qutepart,andreikop/qutepart,Aldenis2112/qutepart,hlamer/qutepart,Aldenis2112/qutepart,Aldenis2112/qutepart,hlamer/qutepart,hlamer/qutepart,andreikop/qutepart,Aldenis2112/qutepart,andreikop/qutepart,hlamer/qutepart,andreikop/qutepart