MissiongManager: ComplexMissionItem: Save preset as CborValue variant

Fix #9423

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

src/MissionManager/ComplexMissionItem.cc

@@ -79,7 +79,11 @@ void ComplexMissionItem::_savePresetJson(const QString& name, QJsonObject& prese
     QSettings settings;
     settings.beginGroup(presetsSettingsGroup());
     settings.beginGroup(_presetSettingsKey);
-    settings.setValue(name, QCborMap::fromJsonObject(presetObject).toCborValue().toByteArray());
+#if QT_VERSION < QT_VERSION_CHECK(5, 15, 0)
+    settings.setValue(name, QJsonDocument(presetObject).toBinaryData());
+#else
+    settings.setValue(name, QCborMap::fromJsonObject(presetObject).toCborValue().toVariant());
+#endif
 
     // Use this to save a survey preset as a JSON file to be included in the build
     // as a built-in survey preset that cannot be deleted.
@@ -108,7 +112,11 @@ QJsonObject ComplexMissionItem::_loadPresetJson(const QString& name)
     QSettings settings;
     settings.beginGroup(presetsSettingsGroup());
     settings.beginGroup(_presetSettingsKey);
-    return QCborValue(settings.value(name).toByteArray()).toMap().toJsonObject();
+#if QT_VERSION < QT_VERSION_CHECK(5, 15, 0)
+    return QJsonDocument::fromBinaryData(settings.value(name).toByteArray()).object();
+#else
+    return QCborValue::fromVariant(settings.value(name)).toMap().toJsonObject();
+#endif
 }
 
 void ComplexMissionItem::addKMLVisuals(KMLPlanDomDocument& /* domDocument */)