Decouple UI merging branch

src/Microsoft.Identity.Web/AzureADB2COpenIDConnectEventHandlers.cs

@@ -75,7 +75,7 @@ public Task OnRemoteFailure(RemoteFailureContext context)
             if (isOidcProtocolException && message.Contains(ErrorCodes.B2CForgottenPassword, StringComparison.OrdinalIgnoreCase))
             {
                 // If the user clicked the reset password link, redirect to the reset password route
-                context.Response.Redirect($"{context.Request.PathBase}/MicrosoftIdentity/Account/ResetPassword/{SchemeName}");
+                context.Response.Redirect($"{context.Request.PathBase}{Options.ResetPasswordPath}/{SchemeName}");
             }
 
             // Access denied errors happen when a user cancels an action on the Azure Active Directory B2C UI. We just redirect back to
@@ -92,7 +92,7 @@ public Task OnRemoteFailure(RemoteFailureContext context)
             {
                 _errorAccessor.SetMessage(context.HttpContext, message);
 
-                context.Response.Redirect($"{context.Request.PathBase}/MicrosoftIdentity/Account/Error");
+                context.Response.Redirect($"{context.Request.PathBase}{Options.ErrorPath}");
             }
 
             return Task.CompletedTask;

src/Microsoft.Identity.Web/MergedOptions.cs

@@ -47,6 +47,8 @@ public ConfidentialClientApplicationOptions ConfidentialClientApplicationOptions
 
         internal static void UpdateMergedOptionsFromMicrosoftIdentityOptions(MicrosoftIdentityOptions microsoftIdentityOptions, MergedOptions mergedOptions)
         {
+            mergedOptions.ResetPasswordPath = microsoftIdentityOptions.ResetPasswordPath;
+            mergedOptions.ErrorPath = microsoftIdentityOptions.ErrorPath;
             mergedOptions.AccessDeniedPath = microsoftIdentityOptions.AccessDeniedPath;
             mergedOptions.AllowWebApiToBeAuthorizedByACL = microsoftIdentityOptions.AllowWebApiToBeAuthorizedByACL;
             mergedOptions.AuthenticationMethod = microsoftIdentityOptions.AuthenticationMethod;