Add comment about why we update color scheme on initialize

Author: JoeRobich

src/VisualStudio/Core/Def/Implementation/ColorSchemes/ColorSchemeApplier.cs

@@ -80,6 +80,13 @@ public void Initialize()
 
                 VSColorTheme.ThemeChanged += VSColorTheme_ThemeChanged;
 
+                // Since the Roslyn colors are now defined in the Roslyn repo and no longer applied by the VS pkgdef built from EditorColors.xml,
+                // We attempt to apply a color scheme when the Roslyn package is loaded. This is our chance to update the configuration registry
+                // with the Roslyn colors before they are seen by the user. This is important because the MEF exported Roslyn classification
+                // colors are only applicable to the Blue and Light VS themes.
+
+                // When we update the colors we also flag that this is potentially a theme change, as settings could have synced over from a
+                // different VS instance and we may need to perform additional work to default colors that match our scheme.
                 UpdateColorScheme(themeChanged: true);
             }
         }