request focus on email field for hint page

src/App/Pages/Accounts/HintPage.xaml

@@ -23,6 +23,7 @@
                     Text="{u:I18n EmailAddress}"
                     StyleClass="box-label" />
                 <Entry
+                    x:Name="_email"
                     Text="{Binding Email}"
                     Keyboard="Email"
                     StyleClass="box-value"

src/App/Pages/Accounts/HintPage.xaml.cs

@@ -13,6 +13,12 @@ namespace Bit.App.Pages
             _vm.Page = this;
         }
 
+        protected override void OnAppearing()
+        {
+            base.OnAppearing();
+            RequestFocus(_email);
+        }
+
         private async void Submit_Clicked(object sender, EventArgs e)
         {
             if(DoOnce())