Pizza tracker handle RBF replacements

frontend/src/app/components/tracker/tracker.component.scss

@@ -187,4 +187,12 @@
   padding: 0.5em;
   background: var(--primary);
   color: white;
+  cursor: pointer;
+}
+
+.alert-replaced {
+  background: var(--danger);
+  margin: 1em 0.5em;
+  padding: 0.5em;
+  border-radius: 0.5em;
 }