Mobile fixups (#1346)

* Fix logo size and background

* Comment out app shutdown on Android, because it needs more thought

backend/FwLite/FwLiteMaui/FwLiteMaui.csproj

@@ -60,8 +60,7 @@
 	<ItemGroup>
 		<!-- App Icon -->
         <!--        background color is required for mac per: https://learn.microsoft.com/en-us/dotnet/maui/user-interface/images/app-icons?view=net-maui-8.0&tabs=windows#recolor-the-background -->
-        <MauiIcon Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'ios'" Include="Resources\AppIcon\logo_light.svg" Color="#1c4e80" />
-		<MauiIcon Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) != 'ios'" Include="Resources\AppIcon\logo_light.svg" />
+        <MauiIcon Include="Resources\AppIcon\logo_light.svg" Color="#1c4e80" />
 
 		<!-- Splash Screen -->
 		<MauiSplashScreen Include="Resources\Splash\splash.svg" Color="#152747" BaseSize="512,512" />

backend/FwLite/FwLiteMaui/MauiProgram.cs

@@ -55,7 +55,12 @@ public static MauiApp CreateMauiApp()
         {
 #if ANDROID
             events.AddAndroid(android => android
-                .OnDestroy((activity) => holder.Shutdown()));
+                .OnDestroy((activity) =>
+                {
+                    // This doesn't work, because OnDestroy gets called e.g. when logging in via OAuth. (and maybe whenever the app is backgrounded?)
+                    // It seems like there is no appropriate hook. Maybe we're just supposed to let the OS kill the app?
+                    //holder.Shutdown();
+                }));
 #endif
 #if IOS || MACCATALYST
             events.AddiOS(ios => ios