[Companion] Model Setup: Prevent bogus modification signals. (#4896)

* [Companion] Model editor Setup panel: Prevent bogus modification signals, eg. when populating protocols box or when removing focus from some fields w/out the value actually changing; Remove unnecessary function.

* [SetupPanel] Fix comparison warning and also a translation issue with Multiprotocols subtype and option names.

* [ModelPrinter] Add a missing include.

companion/src/modelprinter.cpp

@@ -22,6 +22,7 @@
 #include "modelprinter.h"
 #include "multiprotocols.h"
 
+#include <QApplication>
 #include <QPainter>
 #include <QFile>
 #include <QUrl>
@@ -146,7 +147,7 @@ QString ModelPrinter::printMultiSubType(int rfProtocol, bool custom, unsigned in
   Multiprotocols::MultiProtocolDefinition pdef = multiProtocols.getProtocol(rfProtocol);
 
   if (subType < (unsigned int) pdef.subTypeStrings.size())
-    return pdef.subTypeStrings[subType];
+    return qApp->translate("Multiprotocols", qPrintable(pdef.subTypeStrings[subType]));
   else
     return "???";
 }