UASManager: Add signal to indicate deletion of UAS with ID

src/uas/UASManager.cc

@@ -340,6 +340,7 @@ void UASManager::removeUAS(UASInterface* uas)
         // Notify other UI elements that a UAS is being deleted before finally deleting it.
         qDebug() << "Deleting UAS object: " << uas->getUASName();
         emit UASDeleted(uas);
+        emit UASDeleted(uas->getUASID());
         uas->deleteLater();
     }
 }

src/uas/UASManagerInterface.h

@@ -98,6 +98,8 @@ signals:
     void UASCreated(UASInterface* UAS);
     /** A system was deleted */
     void UASDeleted(UASInterface* UAS);
+    /** A system was deleted */
+    void UASDeleted(int systemId);
     /** @brief The UAS currently under main operator control changed */
     void activeUASSet(UASInterface* UAS);
     /** @brief The UAS currently under main operator control changed */