Fix trivial GUI typo.
Fix trivial GUI typo.

TRB should be TBR for "Token Bucket Regulator".
phil-davis/pfsense,BlackstarGroup/pfsense,NewEraCracker/pfsense,dennypage/pfsense,pfsense/pfsense,NewEraCracker/pfsense,dennypage/pfsense,dennypage/pfsense,phil-davis/pfsense,phil-davis/pfsense,pfsense/pfsense,ch1c4um/pfsense,ptorsten/pfsense,jxmx/pfsense,NewEraCracker/pfsense,jxmx/pfsense,brunostein/pfsense,ch1c4um/pfsense,jxmx/pfsense,NOYB/pfsense,NOYB/pfsense,BlackstarGroup/pfsense,ptorsten/pfsense,NewEraCracker/pfsense,pfsense/pfsense,ptorsten/pfsense,dennypage/pfsense,ch1c4um/pfsense,ch1c4um/pfsense,BlackstarGroup/pfsense,brunostein/pfsense,brunostein/pfsense,BlackstarGroup/pfsense,phil-davis/pfsense,pfsense/pfsense,NOYB/pfsense