[Companion] Show custom control names throughout the UI (& internal refactoring) (#4693)

* [Companion] Introduce new Boards class to further consolidate hardware metadata and remove some globals.

* [Companion] * RawSource::toString() and RawSwitch::toString() can now return custom hardware names (if given a GeneralSettings object) for the following types (respectively):
    SOURCE_TYPE_STICK, SOURCE_TYPE_SWITCH, SWITCH_TYPE_SWITCH, & SWITCH_TYPE_MULTIPOS_POT;
* RawSource::isPot() and isSlider() can now return their own index position in potConfig[]/sliderConfig[];
* Switch indicator strings can be localized if necessary.

* [Companion] Refactor model printers to use new RawSource/RawSwitch capabilities; Simplify model-to-printer mapping scheme in multimodelprinter; Use const ModelData pointer.

* [Companion] Refactor how RawSource and RawSwitch selection combo boxes are populated, using cache-able data models instead of direct manipulation; Refactor some other Helpers function into their own namespace.

* Cosmetics & forgotten qualifier.

companion/src/storage/eepe.cpp

@@ -31,23 +31,23 @@ bool EepeFormat::load(RadioData & radioData)
     setError(QObject::tr("Unable to open %1: %2").arg(filename).arg(file.errorString()));
     return false;
   }
-  
+
   QTextStream inputStream(&file);
   QString hline = inputStream.readLine();
   if (hline != EEPE_EEPROM_FILE_HEADER) {
     qDebug() << qPrintable("[eepe] No EEPE header");
     return false;
   }
-  
+
   qDebug() << qPrintable("[eepe] EEPE header found");
-  
-  QByteArray eeprom(EESIZE_MAX, 0);
-  int eeprom_size = HexInterface(inputStream).load((uint8_t *)eeprom.data(), EESIZE_MAX);
+
+  QByteArray eeprom(Boards::getEEpromSize(Board::BOARD_UNKNOWN), 0);
+  int eeprom_size = HexInterface(inputStream).load((uint8_t *)eeprom.data(), Boards::getEEpromSize(Board::BOARD_UNKNOWN));
   if (!eeprom_size) {
     setError(QObject::tr("Invalid EEPROM file %1").arg(filename));
     return false;
   }
   eeprom.resize(eeprom_size);
-  
+
   return extract(radioData, eeprom);
 }