Hamburger button state is now correct (no more double clicks) but it's a bit hacky

Changed Help tooltip location in New Database Settings page
Suggest Save As when opening DB when another is opened and there is a save error

ModernKeePass/ViewModels/MainVm.cs

@@ -183,8 +183,8 @@ namespace ModernKeePass.ViewModels
                         }
                         catch (SaveException exception)
                         {
-                            // TODO: Implement save as
                             _notification.Show(exception.Source, exception.Message);
+                            MessengerInstance.Send(new SaveErrorMessage { Message = exception.Message });
                             return;
                         }
                     }