Unnecessary device filtering
The moserial port setup dialog will only list the /dev/ttySnn, /dev/ttyUSBnn, and /dev/rfcommnn ports that actually exist on the system, for values of "nn" between 0 and 31.
Because of static device name filters, moserial is not yet compatible with the hardware UART present on Raspberry Pi hardware:
This is unfortunate because Raspberry Pi hardware is widely used by developers, and moserial is intended to serve that very audience. Please consider fixing the device filter, or just allowing users to manually type device paths as desired.