improve names of virtual ports

[mzero]

This changes the names of the virtual ports so they are easier to identify:

patch@patchcube:~ $ midiwala list
Ports:
    Launchpad Pro MK3 : LPProMK3 MIDI [ 28:0] <->
    Launchpad Pro MK3 : LPProMK3 DIN  [ 28:1] <->
    Launchpad Pro MK3 : LPProMK3 DAW  [ 28:2] <->
    MicroMonsta 2     : MIDI 1        [ 24:0] <->
    Midi Through      : Port-0        [ 14:0] <->
    TouchOSC Bridge   : In            [131:0] <--
    TouchOSC Bridge   : Out           [132:0] -->
Connections:
    -- no connections --

This enables easy connections, like so:

patch@patchcube:~ $ midiwala connect TouchOSC Monsta
Connected TouchOSC Bridge:Out [132:0] --> MicroMonsta 2:MIDI 1 [24:0]

patch@patchcube:~ $ midiwala connect Launchpad TouchOSC
Connected Launchpad Pro MK3:LPProMK3 MIDI [28:0] --> TouchOSC Bridge:In [131:0]