Fixing up issues with flow diagram

Saga was not displaying different statuses
In certain conditions some arrow were missing

Author: johnsimons

src/Frontend/package-lock.json

@@ -20,6 +20,7 @@
     "@codemirror/lang-json": "^6.0.1",
     "@codemirror/lang-xml": "^6.1.0",
     "@codemirror/legacy-modes": "^6.5.0",
+    "@dagrejs/dagre": "^1.1.4",
     "@tinyhttp/content-disposition": "^2.2.2",
     "@vue-flow/controls": "^1.1.2",
     "@vue-flow/core": "^1.42.5",

src/Frontend/package.json

@@ -371,7 +371,7 @@ function typeIcon(type: MessageType) {
 }
 
 .pa-flow-saga {
-  background-image: url("@/assets/saga.svg");
+  background-image: url("@/assets/saga-completed.svg");
   background-position: center;
   background-repeat: no-repeat;
   height: 15px;