Security fixes for Site Administrators to ensure proper access. Improvements to User and Role management components. Fix logic in CreateUser so that it does not prevent Administrators from creating users.

Oqtane.Server/Infrastructure/DatabaseManager.cs

@@ -348,10 +348,10 @@ namespace Oqtane.Infrastructure
                 var user = new User
                 {
                     SiteId = site.SiteId,
-                    Username = GetInstallationConfig(SettingKeys.HostUserKey, Constants.HostUser),
+                    Username = Constants.HostUser,
                     Password = password,
                     Email = email,
-                    DisplayName = GetInstallationConfig(SettingKeys.HostUserKey, Constants.HostUser),
+                    DisplayName = Constants.HostUser
                 };
                 CreateHostUser(folders, userRoles, roles, users, identityUserManager, user);
                 tenant.IsInitialized = true;