move event.locations to more unique event.online_locations, various fixes on insertion workflow, improved locale messages

server/migrations/20221215110244-online_locations.js

@@ -0,0 +1,29 @@
+'use strict';
+
+module.exports = {
+  async up (queryInterface, Sequelize) {
+    /**
+     * Add altering commands here.
+     *
+     * Example:
+     * await queryInterface.createTable('users', { id: Sequelize.INTEGER });
+     */
+     return Promise.all(
+      [
+        await queryInterface.addColumn('events', 'online_locations', { type: Sequelize.JSON }),
+      ])
+  },
+
+  async down (queryInterface, Sequelize) {
+    /**
+     * Add reverting commands here.
+     *
+     * Example:
+     * await queryInterface.dropTable('users');
+     */
+     return Promise.all(
+      [
+        await queryInterface.removeColumn('events', 'online_locations'),
+      ])
+  }
+};