Shady nagy/blazor enhance (#429)

* - Using cdnjs not nuget on bootstrap and signalr.
- Bootstrap modal used for add, edit details and delete.

* EditForm inside modal-content

* Top close button action added

* Removed unused using.

* DeleteCookies moved inside AuthService

* ApplicationCore removed from BlazorAdmin dependencies

* SecureHttpClient removed

* Logout from identity manager added

* last thing to do in logout from admin is LogoutIdentityManager.

* JSRuntime used in AuthService without pass to the functions

* Link fixed when logout from MVC

src/BlazorAdmin/Pages/Logout.razor

@@ -1,27 +1,15 @@
 @page "/logout"
 @inject AuthService AuthService
-@inject NavigationManager NavigationManager
 @inject IJSRuntime JSRuntime
 @inherits BlazorAdmin.Helpers.BlazorComponent
 
 
 @code {
 
-
     protected override async Task OnInitializedAsync()
     {
         await AuthService.Logout();
-        await DeleteCookies();
-
-        CallRequestRefresh();
         await new Route(JSRuntime).RouteOutside("/Identity/Account/Login");
     }
 
-    private async Task DeleteCookies()
-    {
-        await new Cookies(JSRuntime).DeleteCookie("token");
-        await new Cookies(JSRuntime).DeleteCookie("username");
-    }
-
-
 }