#4419 remove spreadsheet file browser

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35315 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
add GeoGebraConstants.APPLICATION_NAME (+compile error)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35316 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e