merged from protocol-3; fix for DFL-134, 'Source' window goes blank on pressing 'stop on script' when the script is stopped at some line .
merged from protocol-3; fix for DFL-134, 'Source' window goes blank on pressing 'stop on script' when the script is stopped at some line .

operasoftware/dragonfly,operasoftware/dragonfly,operasoftware/dragonfly,operasoftware/dragonfly