File Open and Save dialog boxes assert or "Encountered an improper argument."

[azureskydiver]

Repro steps:

1. File.Open or File.Save

Results:
On debug builds:
Assert: "Debug Assertion Failed!"
Program: "D:\z\EasyBridge\Build\Bin\Debug\EasyBridge.exe"
File: f:\dd\vctools\vt7libs\ship\atlmfc\src\mft\winocc.cpp
Line: 241

On release builds:
Error box: "Encountered an improper argument."

Expected results:
No assert or error box.

[azureskydiver]

Root cause of this is that Vista style dialog boxes don't support customization by templates anymore. Need to switch over to using IFileDialogCustomization interface if we detect that we are on Vista or later.