[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/radiointerface.cpp

@@ -84,17 +84,13 @@ QStringList getDfuArgs(const QString & cmd, const QString & filename)
 {
   QStringList args;
   burnConfigDialog bcd;
-  QString memory = "0x08000000";
-  if (cmd == "-U") {
-    memory.append(QString(":%1").arg(getCurrentFirmware()->getFlashSize()));
-  }
   args << bcd.getDFUArgs();
-  if (!filename.endsWith(".dfu")) {
-    args << "--dfuse-address" << memory;
-  }
-  args << "-d" << "0483:df11";
-  QString fullcmd = cmd + filename;
-  args << "" << fullcmd;
+  if (!filename.endsWith(".dfu"))
+    args << "--dfuse-address" << "0x08000000";
+  if (cmd == "-U")
+    args.last().append(":" % QString::number(Boards::getFlashSize(getCurrentBoard())));
+  args << "--device" << "0483:df11";
+  args << "" << cmd % filename;
   return args;
 }
 
@@ -467,7 +463,7 @@ QString findMassstoragePath(const QString & filename, bool onlyPath)
 #if !defined __APPLE__
       QString fstype = entry->me_type;
       // qDebug() << eepromfile;
-      
+
       if (fstype.contains("fat") && QFile::exists(eepromfile)) {
 #else
       if (QFile::exists(eepromfile)) {