[Companion] Radio conversion improvements (#5534)

* Move MultiposPots & MultiposPotsPositions capability lookups and getAnalogInputName() to Boards class.

* Add RawSource::isAvailable() and RawSwitch::isAvailable(); Add board type param to various RawSource lookup functions.

* Add CustomFunctionData::toString(), FlightModeData::toString(), FactoryInstalledPots board capability, MAX_SWITCH_TYPE, & break out GeneralSettings source/switch defaults to own function.

* Add RadioDataConversionState class for tracking conversion actions.

* Implement RadioDataConversionState handler, add conversion process report, and improve/fix conversion issues:
    * Make sure all switches/pots/knobs have default configs for destination board type;
    * Try to move more custom control names, intelligently;
    * Convert model timers and throttle source;
    * Adjust for Horus 6P switch in place of Taranis S2 knob;
    * Adjust for extra sliders on X12 and X9E to move LS and RS to proper slots as needed;
    * Make sure ALL controls are validated, eg. to always account for extra trims/analogs/switches/etc which don't exist on destination;
    * Properly indicate invalid RawSource::toString() items with "???".

* Allow user to cancel out of file conversions & provide ample warnings if switching radio type/profile with unsaved file(s) still open;
Also: Fix bug with some orphaned MdiChild windows never being deleted; Create static bool Storage::isBoardCompatible(b1, b2).

* Add maxLibQt "stub" (will not compile).

* Add ExportableTableView for better presentation of conversion results table.

* Move getFourCC() and isBoardCompatible() to Boards class.

companion/src/modelprinter.cpp

@@ -490,13 +490,7 @@ QString ModelPrinter::printFlightModeSwitch(const RawSwitch & swtch)
 
 QString ModelPrinter::printFlightModeName(int index)
 {
-  const FlightModeData & fm = model.flightModeData[index];
-  if (strlen(fm.name) > 0) {
-    return QString("%1").arg(fm.name);
-  }
-  else {
-    return tr("FM%1").arg(index);
-  }
+  return model.flightModeData[index].toString(index);
 }
 
 QString ModelPrinter::printFlightModes(unsigned int flightModes)