toggleable fullscreen button

apps/worm.lua

@@ -3,6 +3,7 @@ local window = require("libs.window")
 local x, y = term.getSize()
 local win = window.create("Worm", x / 1.4, y / 1.4, x / 2 - ((x / 1.4) / 2), y / 2 - ((y / 1.5) / 2))
 win.resizable = false
+win.fullscreenButton = false
 sleep()
 compat.runFile("/rom/programs/fun/worm.lua", win)
 win.close()