Better RPD Model Error system

[shamansir]

Better RPD Model Error system

[shamansir]

Probably the same as #12, since Kefir now supports errors in streams.

[shamansir]

All of "system" errors (like unregistered inlet type) should be thrown as JS errors and then shown in UI somewhere at the top... may be

[shamansir]

Showing errors: #164

[shamansir]

All of "system" errors (like unregistered inlet type) should be thrown as JS errors and then shown in UI somewhere at the top... may be

Wrong, errors should be fired as Kefir errors in streams and passed to parent collecting pool.

[shamansir]

errors should be fired as Kefir errors in streams and passed to parent collecting pool.

...and then, show them in UI