slightly stronger gradient on modern theme

src/draw.c

@@ -111,7 +111,7 @@ void MwDrawRectFading(MwWidget handle, MwRect* rect, MwLLColor color, int rounde
 	int	       y, i;
 	double	       darken	  = 0.;
 	int	       ColorDiff  = get_color_diff(handle);
-	double	       darkenStep = (ColorDiff / 4.) / rect->height;
+	double	       darkenStep = (ColorDiff / 2.) / rect->height;
 	unsigned long  sz	  = 1 * rect->height * 4;
 	unsigned char* data	  = malloc(sz);
 	MwRect	       r	  = *rect;