AppManager: App installation status monitoring

Change-Id: I64f4ae0d27892b74f8827a275907cb75da09a758
diff --git a/apps/canvas/front/src/lib/config.ts b/apps/canvas/front/src/lib/config.ts
index fcea7c3..f8d82ed 100644
--- a/apps/canvas/front/src/lib/config.ts
+++ b/apps/canvas/front/src/lib/config.ts
@@ -222,6 +222,7 @@
 }
 
 function EmptyValidator(nodes: AppNode[]): Message[] {
+    nodes = nodes.filter((n) => n.type !== "network");
     if (nodes.length > 0) {
         return [];
     }
@@ -382,4 +383,4 @@
         onLooseHighlight: (store) => store.updateNode(n.id, { selected: false }),
     }));
     return noNetwork.concat(notConnected);
-}
\ No newline at end of file
+}