- (Core) Fixed issue with invalid Confirm Account URL sent from new L…

…ogin block. (Fixes #5580)

Rock.Blocks/Security/Login.cs

@@ -1133,7 +1133,7 @@ private void SendConfirmation( UserLogin userLogin )
 
                 var mergeFields = GetMergeFields( new Dictionary<string, object>
                 {
-                    { "ConfirmAccountUrl", RequestContext.RootUrlPath + url.TrimStart( '/' ) },
+                    { "ConfirmAccountUrl", RequestContext.RootUrlPath.EnsureTrailingForwardslash() + url.RemoveLeadingForwardslash() },
                     { "Person", userLogin.Person },
                     { "User", userLogin }
                 } );