Couple UI Fixes (#255)

- Disabled UI navigation cache for all pages.
- Restore the renderer<>composer page animation back.
- IdlePage functionality into mail list page.
- Couple bugfixes.

Wino.Mail/Services/WinoNavigationService.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Linq;
 using CommunityToolkit.Mvvm.Messaging;
 using Windows.UI.Xaml;
 using Windows.UI.Xaml.Controls;
@@ -18,6 +19,14 @@ namespace Wino.Services
 {
     public class WinoNavigationService : IWinoNavigationService
     {
+        private readonly IStatePersistanceService _statePersistanceService;
+
+        private WinoPage[] _renderingPageTypes = new WinoPage[]
+        {
+            WinoPage.MailRenderingPage,
+            WinoPage.ComposePage
+        };
+
         private Frame GetCoreFrame(NavigationReferenceFrame frameType)
         {
             if (Window.Current.Content is Frame appFrame && appFrame.Content is AppShell shellPage)
@@ -36,6 +45,11 @@ namespace Wino.Services
             }
         }
 
+        public WinoNavigationService(IStatePersistanceService statePersistanceService)
+        {
+            _statePersistanceService = statePersistanceService;
+        }
+
         private Type GetPageType(WinoPage winoPage)
         {
             switch (winoPage)
@@ -85,6 +99,8 @@ namespace Wino.Services
             var pageType = GetPageType(page);
             Frame shellFrame = GetCoreFrame(NavigationReferenceFrame.ShellFrame);
 
+            _statePersistanceService.IsReadingMail = _renderingPageTypes.Contains(page);
+
             if (shellFrame != null)
             {
                 var currentFrameType = GetCurrentFrameType(ref shellFrame);