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/Shared/MainLayout.razor

@@ -1,12 +1,9 @@
-@using BlazorAdmin.Services
-@using BlazorAdmin.JavaScript
-
-@inject AuthService Auth
+@inject AuthService Auth
 @inject IJSRuntime JSRuntime
 
 @inherits BlazorAdmin.Helpers.BlazorLayoutComponent
 
-<AuthorizeView Roles=@Microsoft.eShopWeb.ApplicationCore.Constants.AuthorizationConstants.Roles.ADMINISTRATORS>
+<AuthorizeView Roles=@Constants.Roles.ADMINISTRATORS>
     <div class="sidebar">
         <NavMenu />
     </div>
@@ -28,7 +25,7 @@
     {
         if (firstRender)
         {
-            await Auth.RefreshLoginInfoFromCookie(JSRuntime);
+            await Auth.RefreshLoginInfoFromCookie();
             if (!Auth.IsLoggedIn)
             {
                 await new Route(JSRuntime).RouteOutside("/Identity/Account/Login");