Fix user email validation in IE and Edge by using ng-required instead of required on input type=email.

src/Umbraco.Web.UI.Client/src/views/users/views/user/details.html

@@ -19,7 +19,7 @@
                            name="email"
                            id="email"
                            val-email
-                           required
+                           ng-required="true"
                            val-server-field="Email" />
                     <span class="help-inline" val-msg-for="email" val-toggle-msg="required"><localize key="general_required">Required</localize></span>
                     <span class="help-inline" val-msg-for="email" val-toggle-msg="valServerField"></span>