ViewLocalizer should look for resource name with the application name prefix when LocalizationOptions.ResourcesPath is not set

[DamianEdwards]

Like #3717

When LocalizationOptions.ResourcesPath is not set, ViewLocalizer should prepend the view execution path with the application name.

Let's also trim off the ".cshtml" file extension as having to include that in the resx file name is just cruel.

e.g. where View.ExecutingFilePath is MyApp/Views/Home/Index.cshtml and LocalizationOptions.ResourcesPath is not set, ViewLocalizer would look for a resource with base name "MyApp.Views.Home.Index".