So I am able to prompt the USB pop-up using NickelMenu. I also see
Code:
rescan_books_full - forces a full usb connect/disconnect cycle
It seems to function the same way whether or not the device is connected via USB. It did add a book downloaded wirelessly in KOReader to the stock catalog, but even when the device was plugged in, the metadata did not update.
Maybe I'm being greedy, but is forcing the USB connection dialog the furthest I can take this?