Feature: allow setting maximum zoom level at which sprites are drawn (#8604)

src/settings.cpp

@@ -1127,6 +1127,13 @@ static bool ZoomMinMaxChanged(int32 p1)
 	return true;
 }
 
+static bool SpriteZoomMinChanged(int32 p1) {
+	GfxClearSpriteCache();
+	/* Force all sprites to redraw at the new chosen zoom level */
+	MarkWholeScreenDirty();
+	return true;
+}
+
 /**
  * Update any possible saveload window and delete any newgrf dialogue as
  * its widget parts might change. Reinit all windows as it allows access to the