Default value of background image stretch mode is `fill` instead of `uniformToFill`

[CookieHCl]

Environment

Windows build number: Microsoft Windows NT 10.0.19042.0
Windows Terminal version (if applicable): 1.4.3141.0, installed from chocolatey

Steps to reproduce

Add a background image to profile settings.
Don't set backgroundImageStretchMode so it can have default value.

Expected behavior

Background image should stretch like uniformToFill, because according to the documentation, this is the default value of backgroundImageStretchMode.

Actual behavior

Background image stretch like fill.

uniformToFill setting works if you explicitely set backgroundImageStretchMode, but it won't work in default value.

[Don-Vito]

@CookieHCl - Yep.. in the code the default behavior of BackgroundImageStretchMode within Profile is Fill.
I guess this is not intentional, as in TerminalSettings the default is UniformToFill (but it gets overridden by Profile).
I am not an owner or an expert but If you want to contribute a fix for it I will gladly assist.

[zadjii-msft]

Oh well that's weird, and definitely not intentional. Good catch!