use redux for NoteCreator state management (#494)

* use redux for NoteCreator state management

This fixes a bug where the modal closes while replying to a note. This happens if the thread re-renders while you are replying.

Drafts of notes are also now automatically saved unless the user clicks the cancel button.

* fix modal closing bug

* really fix modal closing bug

* fix rebase

packages/app/src/State/Store.ts

@@ -1,9 +1,11 @@
 import { configureStore } from "@reduxjs/toolkit";
 import { reducer as LoginReducer } from "State/Login";
+import { reducer as NoteCreatorReducer } from "State/NoteCreator";
 
 const store = configureStore({
   reducer: {
     login: LoginReducer,
+    noteCreator: NoteCreatorReducer,
   },
 });