If parameter version is too old, setup is not supported

Also, uas is kept in object

This signal passes the parameter type as well as param info

Waiting for real fix to put back. Issue #1275

Fix for Issue #1255

Also fixed a typo (copy/paste error) in the TCP link settings loading where it was using the UDP port as the default value instead of the TCP port.

changed criticalMessageBoxOnMainThread(const QString& title, const QString& msg) to QGCMessageBox::warning

Switched to new. I’ve seen this before with other Qt classes and have
had to change the usage in the same way.

I understand the intent when this was first created but nobody is using it and it no longer fits the context. If and when a need to abstract the serial link comes back, we can revisit this.