Update Localization apps (#305)

* Update ServerLocalizationResx app

* Update common/localization/ServerLocalizationResx/Components/_Imports.razor

* Update common/localization/ServerLocalizationResx/ServerLocalizationResx.csproj

* Update WASM localization example

* Update common/localization/readme.md

* Render key if string not found. Add user-friendly headings to Home page

* Simplify localization services

* Remove unnecessary stuff from Program.cs

Author: dimodi

common/localization/ClientLocalizationResx/Client/App.razor renamed to common/localization/ClientLocalizationResx/App.razor

@@ -1,10 +1,12 @@
-<Router AppAssembly="@typeof(Program).Assembly">
-    <Found Context="routeData">
-        <RouteView RouteData="@routeData" DefaultLayout="@typeof(MainLayout)" />
-    </Found>
-    <NotFound>
-        <LayoutView Layout="@typeof(MainLayout)">
-            <p>Sorry, there's nothing at this address.</p>
-        </LayoutView>
-    </NotFound>
-</Router>
+<Router AppAssembly="@typeof(App).Assembly">
+    <Found Context="routeData">
+        <RouteView RouteData="@routeData" DefaultLayout="@typeof(MainLayout)" />
+        <FocusOnNavigate RouteData="@routeData" Selector="h1" />
+    </Found>
+    <NotFound>
+        <PageTitle>Not found</PageTitle>
+        <LayoutView Layout="@typeof(MainLayout)">
+            <p role="alert">Sorry, there's nothing at this address.</p>
+        </LayoutView>
+    </NotFound>
+</Router>