some comments

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35644 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
fixed boolean for AlgoCellRange update on rename

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35645 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
improving spreadsheet insert row/column

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35646 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e