Moves sendMessage and friends to redux

ts/util/hasDraftAttachments.ts

@@ -0,0 +1,19 @@
+// Copyright 2022 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import type { AttachmentDraftType } from '../types/Attachment';
+
+export function hasDraftAttachments(
+  draftAttachments: Array<AttachmentDraftType> | undefined,
+  options: { includePending: boolean }
+): boolean {
+  if (!draftAttachments) {
+    return false;
+  }
+
+  if (options.includePending) {
+    return draftAttachments.length > 0;
+  }
+
+  return draftAttachments.some(item => !item.pending);
+}