Compute Tray Icon on the fly instead of at build (#5157)

src/common/utils/collection-functions.ts

@@ -48,6 +48,17 @@ export function getOrInsertWith<K, V>(map: Map<K, V>, key: K, builder: () => V):
   return map.get(key);
 }
 
+/**
+ * Like {@link getOrInsertWith} but the builder is async and will be awaited before inserting into the map
+ */
+export async function getOrInsertWithAsync<K, V>(map: Map<K, V>, key: K, asyncBuilder: () => Promise<V>): Promise<V> {
+  if (!map.has(key)) {
+    map.set(key, await asyncBuilder());
+  }
+
+  return map.get(key);
+}
+
 /**
  * Set the value associated with `key` iff there was not a previous value
  * @param map The map to interact with