Extended 80 column card cannot be removed

[ryandesign]

Thanks for OpenEmulator; it's great. I love the CRT effects and disk sounds.

This seems to be a known issue since it was mentioned in the very beta IIe functionality announcement however I didn't see a bug report filed so I wanted to file one to make sure the issue is not forgotten.

There does not appear to be a way in the Apple IIe emulation to disconnect the extended 80 column card or to replace it with a regular 80 column card (or the exciting extended 80 column text/AppleColor adapter card). In the devices window, the Apple IIe Auxiliary Slot shows as "disconnected" and there are no settings, but the computer does exhibit extended 80 column card functionality. (PR#3 works to show 80 column text; double lo-res graphics work.)