Dev Don't crash out if invalid QID is used
Dev Statistics graphs now don't cache if debug=2
Fixed issue #7762: Incorrect graph for List(Radio) with Comment
Fixed issue #7793: Question numbers appear on printout even when survey settings are adjusted not to show them
Fixed issue #7787: Error "Cannot execute queries while other unbuffered queries are active" on function "Get statistics"
Fixed issue #7737: Login in survey-frontend does not regard language