Antialias tweeks

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35803 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Put opacity back

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35804 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
copy new toolbar icons into [web]

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35805 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e