框架keyDown事件机制微调，重构框架主循环和控件相关代码

可以用键盘和手柄控制光标（手柄不完善）
整理代码和部分语言文件细节

parts/scenes/net_newRoom.lua

@@ -53,16 +53,6 @@ function scene.sceneBack()
     BGM.play()
 end
 
-function scene.keyDown(key)
-    if key=='return'then
-        _createRoom()
-    elseif key=='escape'then
-        SCN.back()
-    else
-        WIDGET.keyPressed(key)
-    end
-end
-
 scene.widgetScrollHeight=400
 scene.widgetList={
     WIDGET.newText{name='title',x=40,y=15,font=70,align='L'},
@@ -95,7 +85,7 @@ scene.widgetList={
 
     --Capacity & Create & Back
     WIDGET.newSelector{name='capacity',     x=1070,y=330,w=310,color='lY',list={2,3,4,5,7,10,17,31,49,99},disp=ROOMval('capacity'),code=ROOMsto('capacity')},
-    WIDGET.newButton{name='create',         x=1070,y=480,w=310,h=140,color='lN',font=40,code=pressKey'return'},
+    WIDGET.newButton{name='create',         x=1070,y=480,w=310,h=140,color='lN',font=40,code=_createRoom},
     WIDGET.newButton{name='back',           x=1140,y=640,w=170,h=80,font=60,fText=CHAR.icon.back,code=backScene},
 
     --Special rules