#3842 Rest of the model refactoring and verifying them.

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@30212 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
#3868 fixed

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@30213 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e