fix: layer buttons triggering inconsistently when dragging bottom up

Author: Bentroen

scripts/draw_layericon/draw_layericon.gml

@@ -13,7 +13,7 @@ function draw_layericon(argument0, argument1, argument2, argument3, argument4, a
 	popup_set(xx, yy, 16, 16, str)
 	a = (mouse_rectangle(xx, yy, 16, 16) && window = 0 && locked = 0 && sb_drag = -1)
 
-	var mouse_in_prev = (mouse_xprev >= xx && mouse_yprev >= yy && mouse_xprev <= xx + 16 && mouse_yprev <= yy + 16)
+	var mouse_in_prev = (mouse_xprev >= xx && mouse_yprev >= yy && mouse_xprev < xx + 16 && mouse_yprev < yy + 16)
 	var mouse_entered = (mouse_check_button(mb_left) && (!mouse_in_prev && a))
 	//var mousepress_started_in = (mousepress_x >= xx && mousepress_y >= yy && mousepress_x <= xx + 16 && mousepress_y <= yy + 16)
 	//var mouse_pressed_and_moved_away = false // mousepress_started_in && (mouse_in_prev && !a && mouse_check_button(mb_left))