Hide the "null" value when the WUI user choose no translation, fix #101 
Hide the "null" value when the WUI user choose no translation, fix #101 
abougouffa/alfanous,keelhaule/alfanous,muslih/alfanous,muslih/alfanous,keelhaule/alfanous,abougouffa/alfanous,saifmahamood/alfanous,muslih/alfanous,keelhaule/alfanous,keelhaule/alfanous,abougouffa/alfanous,saifmahamood/alfanous,saifmahamood/alfanous,abougouffa/alfanous,abougouffa/alfanous,muslih/alfanous,saifmahamood/alfanous,saifmahamood/alfanous,saifmahamood/alfanous,abougouffa/alfanous,muslih/alfanous,muslih/alfanous,keelhaule/alfanous,abougouffa/alfanous,keelhaule/alfanous,keelhaule/alfanous,saifmahamood/alfanous,saifmahamood/alfanous,muslih/alfanous