cmake.generator fails when casing is incorrect

@bobbrow Thanks for the update. I am still having issues. I now see:

[cms-client] Configuring using the "ninja" CMake generator with plattform "undefined" and toolset {}
[rollbar] Unhandled exception: Unhandled Promise rejection: Post-folder-open [cmake-server] Failed to activate protocol version: Generator "ninja" not supported. {"folder":{"uri":{"$mid":1,"fsPath":"c:\\SVNProj\\zodiac\\branches\\TRY_TML_CMake_3Oct2019","_sep":1,"external":"file:///c%3A/SVNProj/zodiac/branches/TRY_TML_CMake_3Oct2019","path":"/c:/SVNProj/zodiac/branches/TRY_TML_CMake_3Oct2019","scheme":"file"},"name":"TRY_TML_CMake_3Oct2019","index":0}}

I guess the first message is related to #913?

The main issue seems to be:

Failed to activate protocol version: Generator "ninja" not supported. 

I can run Ninja from a cmd prompt (it is in the system path). How can I fix this problem in Code?

Originally posted by @DavidA2014 in https://github.com/microsoft/vscode-cmake-tools/issues/908#issuecomment-553798672

No source file, test, or entry point is named. Start by reproducing the CMake Tools activation failure with the reported "ninja" generator and inspect the generator-handling path; done means generator casing is handled consistently and the reported activation error no longer occurs.