fix alpha issue in menus

Author: mstop4

current-scripts/Demos/useful-scripts/objects/obj_column_menu/Draw_0.gml

@@ -10,4 +10,5 @@ for (var i=view_area.x; i<=view_area.y; i++) {
 
 if (enabled) {
 	draw_sprite(cursor_spr, 0, x, y + (item_height + line_spacing) * (pos - view_area.x) + item_height / 2);
-}
+}
+draw_set_alpha(1);

current-scripts/Demos/useful-scripts/objects/obj_grid_menu/Draw_0.gml

@@ -17,4 +17,5 @@ if (enabled) {
 		x + (cursor_padding + column_width) * (pos.x - view_area.left),
 		y + (item_height + line_spacing) * (pos.y - view_area.top) + item_height / 2
 	);
-}
+}
+draw_set_alpha(1);

current-scripts/Demos/useful-scripts/objects/obj_nested_menu/Draw_0.gml

@@ -9,4 +9,5 @@ for (var i=0; i<num_items; i++) {
 
 if (enabled) {
 	draw_sprite(cursor_spr, 0, x, y + (item_height + line_spacing) * pos + item_height / 2);
-}
+}
+draw_set_alpha(1);