add wii detection to ISOFile, gray refresh list menuitem when core is running, some cleanup

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@2979 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Core/DolphinWX/Src/Frame.cpp

@@ -305,7 +305,6 @@ CFrame::CFrame(bool showLogWindow,
 	, m_pStatusBar(NULL), bRenderToMain(true)
 	, HaveLeds(false), HaveSpeakers(false)
     , m_Panel(NULL)
-	, m_pMenuBar(NULL)
 	, m_fLastClickTime(0), m_iLastMotionTime(0), LastMouseX(0), LastMouseY(0)
 	#if wxUSE_TIMER
 		, m_timer(this)