when FlashGBX_GUI `ConnectDevice()` calls `self.CONN.GetMode()`, `GetMode()` always returns `None`

[fredemmott]

	def GetMode(self):
		if time.time() < self.LAST_CHECK_ACTIVE + 1: return self.MODE
		if self.CheckActive() is False: return None
		if self.MODE is None: return None # <<<<<<<<
		if self.FW["fw_ver"] < 12: return self.MODE
		mode = self._get_fw_variable("CART_MODE")
                ...

self.MODE is always None in this situation

I don't think think this line is needed?

• if fw_ver < 12, the next line always does the same thing
• if >= 12, it's fetched from the firmware

[fredemmott]

There's an interaction here with FlashGBX_GUI::SetMode(): this requires that the mode is none, in order to handle the first click correctly.

If this issue is fixed, SetMode() may need to be changed

What's the correct behavior for CART_MODE - is it valid for a firmware to force it to 1 (DMG), or should it be 0 until set to 1, even if only DMG is supported?