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/file-uri-to-path/test/test.js

@@ -0,0 +1,24 @@
+
+var sep = require('path').sep || '/';
+var assert = require('assert');
+var uri2path = require('../');
+var tests = require('./tests.json');
+
+describe('file-uri-to-path', function () {
+
+  Object.keys(tests).forEach(function (uri) {
+
+    // the test cases were generated from Windows' PathCreateFromUrlA() function.
+    // On Unix, we have to replace the path separator with the Unix one instead of
+    // the Windows one.
+    var expected = tests[uri].replace(/\\/g, sep);
+
+    it('should convert ' + JSON.stringify(uri) + ' to ' + JSON.stringify(expected),
+    function () {
+      var actual = uri2path(uri);
+      assert.equal(actual, expected);
+    });
+
+  });
+
+});