new design for the StyleBar (web)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@36218 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
removed splash-screen

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@36219 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e