Language choice simplified

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@36173 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Fix for #4528

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@36174 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Refactoring

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@36175 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
(related to #4528) call repaintView when an object is added

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@36176 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e