Make sure app starts without Internet connection (YANPE).

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@32868 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Typo in networkoperation

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@32869 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Disable undo / redo for smart

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@32870 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Error dialogs are back

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@32871 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e