Include Unified Settings view in documentation too

Some users will have the newer "unified settings" view. This change adds a screenshot of that view for such users.

We also reduce the size of the images on screen so they're not as huge as they were, especially now there are two of them.

docs/build-acceleration.md

@@ -91,7 +91,11 @@ Build acceleration runs with the FUTDC, and outputs details of its operation in
 
 > Tools | Options | Projects and Solutions | SDK-Style Projects
 
-![Projects and Solutions, .NET Core options](repo/images/options.png)
+_Traditional view:_
+<img src="repo/images/options.png" width="528" alt="SDK-style project options, in the legacy settings view">
+
+_Unified settings view:_
+<img src="repo/images/options-unified.png" width="528" alt="SDK-style project options, in the modern unified settings view">
 
 Setting _Logging Level_ to a value other than `None` results in messages prefixed with `FastUpToDate:` in Visual Studio's build output.