Terminal: Unable to set colors above index 15 with OSC 4

[zadjii-msft]

From #81:

Conhost doesn't support setting color table entries above 130.

Here's xterm printing in 130 by default:

I couldn't get the syntax just right, but for example, you definitely can change the colors of the extended table:

Note how color 130 is now a black square, instead of the color it usually is

[zadjii-msft]

MSFT:19723934

[miniksa]

I checked this morning and this fix should be in Insiders builds 18312 and higher (build on or after 2019-01-04).

[DHowett-MSFT]

This one's a little funny, actually. Most of the fix is in 18312, but it'll only work for colors 0-99. Colors 100-255 will probably be in whatever insider build comes next.

[miniksa]

Yes, sorry, this one had two changelists on it. It's also inbound.

[DHowett-MSFT]

This is now fully supported as of insider's build 18334.