e14c0e5 Add access to message confirmation link only to sender

Authored and Committed by shraddhaag a year ago
    Add access to message confirmation link only to sender
    
    This commit adds the following functionality:
    1. User needs to be logged in to access confirmation link.
    2. Only the sender of the message can successfully confirm it.
    3. A alert message is displayed when a user that isn't identified
    as the sender of the message accesses the confirmation link.