Show a message when the max number of routings is reached

[DevNull]

I just spent an hour trying to figure out why I wasn't able to map any routings from the PC outputs to DIN plugs.  I just happened to hit the max number of routings with no PC MIDI routings enabled, so I thought something was broken.  Rebooted, restarted the MRCC, swapped USB cables, etc.  I didn't even know that there WAS a max number of routings until I happened across another post on this forum (it doesn't appear to be listed in the manual either?)

A simple message popping up on the display screen that says "max number of port routings (50) reached!" would have saved me some troubleshooting time.

[Jesse Johannesen]

I'll add this request. It sounds like it would be a good one for sure.