Ticket #3510: simplifying the spreadsheet before making changes

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27406 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
there was a missing "restoreEuclidian"

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27407 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Ticket #3510: option to hide the scrollbar of the spreadsheet view

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27408 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
#3503 "does nothing" method created (calculateEnvironment)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27409 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e