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/github-from-package/test/url.js

@@ -0,0 +1,19 @@
+var test = require('tape');
+var github = require('../');
+var packages = {
+    a : require('./a.json'),
+    b : require('./b.json'),
+    c : require('./c.json'),
+    d : require('./d.json'),
+    e : require('./e.json')
+};
+
+test(function (t) {
+    t.plan(5);
+    var url = 'https://github.com/substack/beep-boop';
+    t.equal(url, github(packages.a), 'a.json comparison');
+    t.equal(url, github(packages.b), 'b.json comparison');
+    t.equal(url, github(packages.c), 'c.json comparison');
+    t.equal(url, github(packages.d), 'd.json comparison');
+    t.equal(url, github(packages.e), 'e.json comparison');
+});