fixing data import menu item for desktop spreadsheet context menu

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35758 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
tweaking web spreadsheet options

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35759 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
fixing data import menu item for desktop spreadsheet context menu (missing file)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35760 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
properties fix in spreadsheet context menu

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35761 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e