FRE-600: Fix code review blockers

- Consolidated duplicate UndoManagers to single instance
- Fixed connection promise to only resolve on 'connected' status
- Fixed WebSocketProvider import (WebsocketProvider)
- Added proper doc.destroy() cleanup
- Renamed isPresenceInitialized property to avoid conflict

Co-Authored-By: Paperclip <noreply@paperclip.ing>

node_modules/kebab-case/index.js

@@ -0,0 +1,15 @@
+'use strict';
+var KEBAB_REGEX = /[A-Z\u00C0-\u00D6\u00D8-\u00DE]/g;
+var REVERSE_REGEX = /-[a-z\u00E0-\u00F6\u00F8-\u00FE]/g;
+
+module.exports = exports = function kebabCase(str) {
+	return str.replace(KEBAB_REGEX, function (match) {
+		return '-' + match.toLowerCase();
+	});
+};
+
+exports.reverse = function (str) {
+	return str.replace(REVERSE_REGEX, function (match) {
+		return match.slice(1).toUpperCase();
+	});
+};