[Core] Write out all errors from mdtool build

Should fix BXC11012.
[Ide] Mark projects with broken configuration mapping

BXC11532 - No indication that sln conf mapped to nonexistent project conf
Fix up a bunch of bad configuration mappings

May fix BXC11396 - mdtool crashes when building .sln file
[Ide] Fix casing on generic item GUID

So MD doesn't keep on rewriting it ina  different case than VS.