Fix #3790:
Fix #3790:

- Do not let 2 interfaces to setup the same track6 prefix id
- Show correct prefix id range for each interface

ptorsten/pfsense,pfsense/pfsense,jxmx/pfsense,brunostein/pfsense,phil-davis/pfsense,ch1c4um/pfsense,BlackstarGroup/pfsense,NewEraCracker/pfsense,ptorsten/pfsense,dennypage/pfsense,ptorsten/pfsense,BlackstarGroup/pfsense,brunostein/pfsense,dennypage/pfsense,NOYB/pfsense,phil-davis/pfsense,jxmx/pfsense,BlackstarGroup/pfsense,pfsense/pfsense,dennypage/pfsense,phil-davis/pfsense,brunostein/pfsense,ch1c4um/pfsense,pfsense/pfsense,dennypage/pfsense,NewEraCracker/pfsense,ch1c4um/pfsense,jxmx/pfsense,BlackstarGroup/pfsense,phil-davis/pfsense,NOYB/pfsense,NewEraCracker/pfsense,ch1c4um/pfsense,pfsense/pfsense,NOYB/pfsense,NewEraCracker/pfsense