升级控件模块，封装focus相关的几个静态方法

parts/gametoolfunc.lua

@@ -1,4 +1,3 @@
-local kb=love.keyboard
 local gc=love.graphics
 local gc_push,gc_pop=gc.push,gc.pop
 local gc_origin,gc_translate=gc.origin,gc.translate
@@ -12,7 +11,6 @@ local SETTING,GAME,SCR=SETTING,GAME,SCR
 
 
 --System
-function enableTextInput()if not MOBILE then kb.setTextInput(true)end end
 function switchFullscreen()
 	SETTING.fullscreen=not SETTING.fullscreen
 	love.window.setFullscreen(SETTING.fullscreen)