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/index.js

@@ -0,0 +1,17 @@
+module.exports = function (pkg) {
+    var m;
+    if (m = match(JSON.stringify(pkg.repository))) {
+        return m;
+    }
+    else if (m = match(JSON.stringify(pkg))) {
+        return m;
+    }
+    return undefined;
+};
+
+function match (str) {
+    var m = /\bgithub.com[:\/]([^\/"]+)\/([^\/"]+)/.exec(str);
+    if (m) {
+        return 'https://github.com/' + m[1] + '/' + m[2].replace(/\.git$/, '');
+    }
+}