This regressed around the #7163 timeframe.
We're discussing this on chat currently. It might break the intellisense
on the `#include <winrt/Microsoft.Terminal.TerminalControl.h>` line in
VS 16.7, but we're not _really_ sure? Intellisense has been notoriously
flaky for us.
I'm running 16.6.5, and it works for me. @lhecker is running 16.7 and
confirmed it worked there. If the CI build passes, then this definitely
will work for 16.7.
fe82e97ff6