控件代码分分布到场景代码中，优化控件相关代码

parts/scenes/minigame.lua

@@ -1,3 +1,10 @@
 function sceneInit.minigame()
 	BG.set("space")
-end
+end
+
+WIDGET.init("minigame",{
+	WIDGET.newButton({name="p15",		x=240,	y=250,w=350,h=120,font=40,code=WIDGET.lnk.goScene("p15")}),
+	WIDGET.newButton({name="schulte_G",	x=640,	y=250,w=350,h=120,font=40,code=WIDGET.lnk.goScene("schulte_G")}),
+	WIDGET.newButton({name="pong",		x=1040,	y=250,w=350,h=120,font=40,code=WIDGET.lnk.goScene("pong")}),
+	WIDGET.newButton({name="back",		x=1140,	y=640,w=170,h=80,font=40,code=WIDGET.lnk.BACK}),
+})