#3746 LineStyleModel and applied to desktop.

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@29757 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Ticket #3735: undone changes again, for trying Michael's idea

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@29758 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e