This commit introduces 8 more variants of the .ICO file, embeds the
right ones into WindowsTerminal.exe, and adds code that will select the
most appropriate icon at runtime.
Since we're a Centennial application, the "application" icon inside our
package isn't used by the shell for the taskbar thumbnails or the
Alt-Tab window.
To quote J. Tippet,
> I believe there are two possible fixes:
>
> 1. Fix the OS shell to prefer the MRT icon instead of preferring the
> win32 icon
> 2. Add alternate versions of /res/terminal.ico
> The 1st fix is clearly better, since it benefits any hybrid app. But
> the 2nd fix is much easier, since it'd just take about an hour to gin up
> a new .ico file and hack the .RC file to refer to it when building the
> preview flavor.
... and to quote Michael Ratanapintha,
> Basically, if your MSIX-packaged desktop app's image resources are
> separate files or even separate MSIX packages, they may be loaded by
> MRT. If they're embedded in the .exe, they're the old-fashioned Win32
> resources Mr. Tippet is referring to.
This is the "2nd fix."
Fixes#6777
Co-authored-by: Jeffrey Tippet <jtippet@ntdev.microsoft.com>