Moves conversation.getProps out of models

Co-authored-by: Scott Nonnenberg <scott@signal.org>

ts/util/hasDraft.ts

@@ -0,0 +1,12 @@
+// Copyright 2023 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import type { ConversationAttributesType } from '../model-types';
+
+export function hasDraft(attributes: ConversationAttributesType): boolean {
+  const draftAttachments = attributes.draftAttachments || [];
+
+  return (attributes.draft ||
+    attributes.quotedMessageId ||
+    draftAttachments.length > 0) as boolean;
+}