Better error messages for failures

src/Vehicle/Vehicle.cc

@@ -1712,19 +1712,19 @@ void Vehicle::sendMessageMultiple(mavlink_message_t message)
 void Vehicle::_missionManagerError(int errorCode, const QString& errorMsg)
 {
     Q_UNUSED(errorCode);
-    qgcApp()->showMessage(QString("Error during Mission communication with Vehicle: %1").arg(errorMsg));
+    qgcApp()->showMessage(QString("Mission transfer failed. Retry transfer. Error: %1").arg(errorMsg));
 }
 
 void Vehicle::_geoFenceManagerError(int errorCode, const QString& errorMsg)
 {
     Q_UNUSED(errorCode);
-    qgcApp()->showMessage(QString("Error during GeoFence communication with Vehicle: %1").arg(errorMsg));
+    qgcApp()->showMessage(QString("GeoFence transfer failed. Retry transfer. Error: %1").arg(errorMsg));
 }
 
 void Vehicle::_rallyPointManagerError(int errorCode, const QString& errorMsg)
 {
     Q_UNUSED(errorCode);
-    qgcApp()->showMessage(QString("Error during Rally Point communication with Vehicle: %1").arg(errorMsg));
+    qgcApp()->showMessage(QString("Rally Point transfer failed. Retry transfer. Error: %1").arg(errorMsg));
 }
 
 void Vehicle::_addNewMapTrajectoryPoint(void)