SPA Flicker control works only with hybrid implementation

Issue in ./help/c-implementing-target/c-implementing-target-for-client-side-web/c-how-atjs-works/manage-flicker-with-atjs.md

To hide the div where the view will occur, the prefetched offer must be provided via targetGlobalSettings.serverState

Open help/c-implementing-target/c-implementing-target-for-client-side-web/c-how-atjs-works/manage-flicker-with-atjs.md and review the SPA flicker-control section. Update the documentation so it states that the prefetched offer must be provided through targetGlobalSettings.serverState when hiding the view container; done means the guidance accurately covers this implementation.

Written by the indexing model from the issue text.