Fix for crowdfund perk editor
Fix for crowdfund perk editor

With no title entered, the editor got stuck in an endless loop, because it recursively invoked the save function without checking for the ID fallback being present.

Fixes #2862.

btcpayserver/btcpayserver,btcpayserver/btcpayserver,btcpayserver/btcpayserver,btcpayserver/btcpayserver