The channel and query window buttons on my laptop's mIRC have disappeared, and the status window button now has a dropdown list with the channels and query windows listed underneath. Some of them have checkmarks next to them, and I think the checkmarks mean that there's new text to be read, similar to a button's text turning red.

I didn't deliberately cause this to happen, but I may have inadvertently pushed a key combination, or something.

I can't find a way to turn this off and get back to having one button per channel. Any ideas?