Fix Google Secure Signals UI detection for client-server and server-side

[eiman-eltigani-ttd]

Added refresh/retry logic so the UI stays in sync with the server:

• Moved the secure signals script from header to after token callback to prevent sync (consistent with client-side)
• Lengthened/added timeouts used to check storage
• Added an additional check to client server to check if token exists on refresh and retry if need (consistent with client-side) & updated one of the env variables to include a default just incase

[eiman-eltigani-ttd]

I confirmed that the token is being read and stored locally in the deployed sites but will deploy and test after to confirm these new changes address any premature checks/sync issues