uisettings: Add TODO for stretched aspect being ignored

src/yuzu/uisettings.cpp

@@ -46,6 +46,7 @@ u32 CalculateWidth(u32 height, Settings::AspectRatio ratio) {
         return height * 16 / 10;
     case Settings::AspectRatio::R16_9:
     case Settings::AspectRatio::Stretch:
+        // TODO: Move this function wherever appropriate to implement Stretched aspect
         break;
     }
     return height * 16 / 9;