move _all_ constants into the constants file for better organization

packages/editor/src/store/constants.js

@@ -7,3 +7,22 @@
 export const EDIT_MERGE_PROPERTIES = new Set( [
 	'meta',
 ] );
+
+/**
+ * Constant for the store module (or reducer) key.
+ * @type {string}
+ */
+export const MODULE_KEY = 'core/editor';
+
+export const POST_UPDATE_TRANSACTION_ID = 'post-update';
+export const SAVE_POST_NOTICE_ID = 'SAVE_POST_NOTICE_ID';
+export const TRASH_POST_NOTICE_ID = 'TRASH_POST_NOTICE_ID';
+export const PERMALINK_POSTNAME_REGEX = /%(?:postname|pagename)%/;
+export const INSERTER_UTILITY_HIGH = 3;
+export const INSERTER_UTILITY_MEDIUM = 2;
+export const INSERTER_UTILITY_LOW = 1;
+export const INSERTER_UTILITY_NONE = 0;
+export const MILLISECONDS_PER_HOUR = 3600 * 1000;
+export const MILLISECONDS_PER_DAY = 24 * 3600 * 1000;
+export const MILLISECONDS_PER_WEEK = 7 * 24 * 3600 * 1000;
+export const ONE_MINUTE_IN_MS = 60 * 1000;

packages/editor/src/store/index.js

@@ -11,11 +11,7 @@ import applyMiddlewares from './middlewares';
 import * as selectors from './selectors';
 import * as actions from './actions';
 import controls from './controls';
-
-/**
- * Module Constants
- */
-const MODULE_KEY = 'core/editor';
+import { MODULE_KEY } from './constants';
 
 const store = registerStore( MODULE_KEY, {
 	reducer,