Take visible flag into account when adding sprite to spritelist (#2465)

Author: einarf

arcade/sprite_list/sprite_list.py

@@ -1251,7 +1251,7 @@ def _update_all(self, sprite: SpriteType) -> None:
         self._sprite_color_data[slot * 4] = sprite._color[0]
         self._sprite_color_data[slot * 4 + 1] = sprite._color[1]
         self._sprite_color_data[slot * 4 + 2] = sprite._color[2]
-        self._sprite_color_data[slot * 4 + 3] = sprite._color[3]
+        self._sprite_color_data[slot * 4 + 3] = sprite._color[3] * sprite._visible
         self._sprite_color_changed = True
 
         # Don't deal with textures if spritelist is not initialized.