Windows: Install MSVC runtime before using g.mkfontcap which requires it

[echoix]

Closes #5663

Waiting upon a standalone installer to be generated in order to test it works as intended. The issue in #5663 was reproduced by accident by simply trying to install with the standalone installer on a Windows sandbox instance. These are disposable VMs, that contain a trimmed down version of the OS, and really has nothing in it (not even a notepad now).

[hellik]

I've never found a way to test by the nsis Installer whether MS runtimes are installed and if yes, which of them.

that would be a smart way to inform the user why we are doing runtime installs.