Added PutRoleClaims to RolesController
Added UserClaimsUpdateFailed to IdentityServiceResources

Added UserClaimsUpdateFailed Resource to IdentityServiceResources
Added PutUserClaims to UsersController

Remove generic DbContext from interfaces (based on commits from @Brice-xCIT), use ApplicationParts from @TheEvilPenguin for setup generic types to generic controller from startup class.

Add Breadcrumb to pages; fix redirect after inserting/updateing item; add clientName, roleName, userName to the DTOs becuase of Breadcrumb navigation; remove navigation back button; Fix tests according changes;

Fix namespace Skoruba.IdentityServer4.Admin.AspNetIdentity to Skoruba.IdentityServer4.Admin.BusinessLogic.Identity.

Rewrite business logic - rename AspNetIdentity project to Identity for simplicity. Rewrite the EntityFramework layer into two projects - Identity and IS4.

Add Shared project for common DTOs, helpers etc., Add project for DbContexts - this project contains one predefined DbContext with Asp.Net Identity and IS4 - for whole administration.

Remove generic type for ClaimKey, becuase it is designed for int. Try to use GUID as a default type for all identity entities. Fix some conversion issue in PersistedGrants.

Rework services and repositories for using generic DbContexts. Move interfaces of repositories and services to separates folders. Add another overload for extension method which is responsible for adding admin services.