Notifikation om invitationer: Vis ikke hvis man deltager i aktivitet

[mhewel]

Filtrer så deltagere ikke vises (dvs hvis man har tilmeldt sig efter modtaget invitation).

[what-the-diff]

PR Summary

• Updating the EntryPage
  In the EntryPage.py file, we've removed outdated and inefficient code and opted to utilize a streamlined function, get_unaccepted_invitations_for_family, to aid in fetching unaccepted invitations for the user's family.

• Revamping FamilyDetails
  Just as in EntryPage, we updated FamilyDetails.py with the same function get_unaccepted_invitations_for_family. This ensures both parts of the application are utilizing the most up-to-date and efficient methods in retrieving information.

• Introducing UnacceptedInvitations.py
  We've introduced a new file, UnacceptedInvitations.py, in which we define the new get_unaccepted_invitations_for_family function. This modular function simplifies the process of fetching unaccepted activity invitations for a given family by implementing a strategic subquery. As a result of this addition, the application now runs smoother and more consistently.

[rasmusselsmark]

Testet og valideret lokalt, ser korrekt ud