If[] as function was not localized [needs backport]

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@23793 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Javadoc + warnings

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@23794 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e