satshoot : Offer card: Reworked init process and ticket sub:

- ndkSvelte store guarantees that offer is always defined in the card component

- an Offer card needs to start ticket sub only once at init

- Ticket sub is groupable(1s delay) to NOT generate too many subs with multiple offer cards

- Since we only hide Offer cards on filtering with search function,

the grouped sub is not stopped by filtering offer cards anywhere

- limit was removed from the ticket sub options

https://github.com/Pleb5/satshoot/commit/11f1fab0f33a1f731c9291611b6f66efa1124295