Don't display KeyboardInterrupt in an error box.
tree007a2046d464acdababd14bb0265ec5cc72d377f
-rw-r--r-- 4594 .DirIcon
-rw-r--r-- 1825 AppInfo.xml
-rwxr-xr-x 873 AppRun
drwxr-xr-x - Help
-rwxr-xr-x 1620 MakeDist
drwxr-xr-x - Messages
-rw-r--r-- 604 ROX-Lib.xml
drwxr-xr-x - python
drwxr-xr-x - tests