More background refreshing

flutter/lib/types/immediate_future.dart

@@ -0,0 +1,18 @@
+// This class is useful togther with FutureBuilder
+// Unfortunately Future.value(x) in FutureBuilder always results in one frame were snapshot.connectionState is waiting
+// Whit way we can set the ImmediateFuture.value directly and circumvent that.
+
+class ImmediateFuture<T> {
+  final Future<T> future;
+  final T? value;
+
+  ImmediateFuture(this.future, this.value);
+
+  ImmediateFuture.ofFuture(Future<T> v)
+      : future = v,
+        value = null;
+
+  ImmediateFuture.ofValue(T v)
+      : future = Future.value(v),
+        value = v;
+}