UI tweaks for org invites

src/app/accounts/views/accountsRegister.html

@@ -22,7 +22,7 @@
             <div class="form-group has-feedback" show-errors>
                 <label for="email" class="sr-only">Email</label>
                 <input type="email" id="email" name="Email" class="form-control" placeholder="Email" ng-model="model.email"
-                       required api-field />
+                       ng-readonly="readOnlyEmail" required api-field />
                 <span class="fa fa-envelope form-control-feedback"></span>
                 <p class="help-block">You'll use your email address to log in.</p>
             </div>