Rename VISION IDF to avoid triggering Sophos malware warning.

When building a Windows package Sophos claims that the NSIS-generated
Uninstall.exe contains malware. This must be a false positive and it has been
submitted to Sophos for testing.

We really need to be able produce working kits for the release and the
rename seems to avoid the problem.
Refs #8323
Merge branch 'bugfix/8323_sophos_warning' into develop