fix: Companion read/write of failsafe settings, how displayed on radio (#1399)

* Fix failsafe settings

Resolve #1393

* trigger save if failsafe numbers changed + cleanup

Co-authored-by: Peter Feerick <peter.feerick@gmail.com>

companion/src/firmwares/edgetx/yaml_modeldata.cpp

@@ -337,7 +337,6 @@ struct convert<LimitData> {
     node["offset"] = YamlWriteLimitValue(rhs.offset);
     node["ppmCenter"] = rhs.ppmCenter;
     node["symetrical"] = (int)rhs.symetrical;
-    node["failsafe"] = rhs.failsafe;
     node["name"] = rhs.name;
     node["curve"] = rhs.curve.value;
     return node;
@@ -357,7 +356,6 @@ struct convert<LimitData> {
     node["revert"] >> rhs.revert;
     node["ppmCenter"] >> rhs.ppmCenter;
     node["symetrical"] >> rhs.symetrical;
-    node["failsafe"] >> rhs.failsafe;
     node["name"] >> rhs.name;
     node["curve"] >> rhs.curve.value;
     return true;
@@ -873,6 +871,12 @@ Node convert<ModelData>::encode(const ModelData& rhs)
     }
   }
 
+  for (int i=0; i<CPN_MAX_CHNOUT; i++) {
+    if (rhs.limitData[i].failsafe != 0) {
+      node["failsafeChannels"][std::to_string(i)]["val"] = rhs.limitData[i].failsafe;
+    }
+  }
+  
   for (int i=0; i<CPN_MAX_SCRIPTS; i++) {
     if (strlen(rhs.scriptData[i].filename) > 0) {
       node["scriptData"][std::to_string(i)] = rhs.scriptData[i];
@@ -1046,6 +1050,15 @@ bool convert<ModelData>::decode(const Node& node, ModelData& rhs)
     rhs.moduleData[i].modelId = modelIds[i];
   }
 
+  if (node["failsafeChannels"]) {
+    int failsafeChans[CPN_MAX_CHNOUT];
+    memset(failsafeChans, 0, sizeof(failsafeChans));
+    node["failsafeChannels"] >> failsafeChans;
+    for (int i=0; i<CPN_MAX_CHNOUT; i++) {
+      rhs.limitData[i].failsafe = failsafeChans[i];
+    }
+  }
+
   node["scriptData"] >> rhs.scriptData;
   node["telemetrySensors"] >> rhs.sensorData;