Fix singular form of web UI message
Fix singular form of web UI message

Closes #5753.

mbroadst/rethinkdb,catroot/rethinkdb,catroot/rethinkdb,mbroadst/rethinkdb,grandquista/rethinkdb,eliangidoni/rethinkdb,bchavez/rethinkdb,bchavez/rethinkdb,robertjpayne/rethinkdb,JackieXie168/rethinkdb,jmptrader/rethinkdb,bpradipt/rethinkdb,robertjpayne/rethinkdb,bpradipt/rethinkdb,JackieXie168/rethinkdb,catroot/rethinkdb,bpradipt/rethinkdb,mbroadst/rethinkdb,jmptrader/rethinkdb,grandquista/rethinkdb,JackieXie168/rethinkdb,bpradipt/rethinkdb,bchavez/rethinkdb,mbroadst/rethinkdb,bchavez/rethinkdb,JackieXie168/rethinkdb,robertjpayne/rethinkdb,grandquista/rethinkdb,grandquista/rethinkdb,bpradipt/rethinkdb,jmptrader/rethinkdb,bchavez/rethinkdb,grandquista/rethinkdb,eliangidoni/rethinkdb,mbroadst/rethinkdb,bchavez/rethinkdb,grandquista/rethinkdb,robertjpayne/rethinkdb,jmptrader/rethinkdb,mbroadst/rethinkdb,bpradipt/rethinkdb,eliangidoni/rethinkdb,catroot/rethinkdb,bpradipt/rethinkdb,JackieXie168/rethinkdb,eliangidoni/rethinkdb,bchavez/rethinkdb,JackieXie168/rethinkdb,bchavez/rethinkdb,bpradipt/rethinkdb,mbroadst/rethinkdb,grandquista/rethinkdb,catroot/rethinkdb,catroot/rethinkdb,grandquista/rethinkdb,bchavez/rethinkdb,robertjpayne/rethinkdb,JackieXie168/rethinkdb,bpradipt/rethinkdb,jmptrader/rethinkdb,mbroadst/rethinkdb,mbroadst/rethinkdb,eliangidoni/rethinkdb,eliangidoni/rethinkdb,robertjpayne/rethinkdb,jmptrader/rethinkdb,eliangidoni/rethinkdb,JackieXie168/rethinkdb,eliangidoni/rethinkdb,catroot/rethinkdb,JackieXie168/rethinkdb,jmptrader/rethinkdb,robertjpayne/rethinkdb,catroot/rethinkdb,robertjpayne/rethinkdb,jmptrader/rethinkdb,robertjpayne/rethinkdb,grandquista/rethinkdb,eliangidoni/rethinkdb