Fix ApplicationHelper#flash_type_title to support Ruby 1.9.2.
Fix ApplicationHelper#flash_type_title to support Ruby 1.9.2.

Ruby 1.8.7 has Array#choice, while 1.9.2 has Array#sample.
Switched to Array#sample, which works with both because
Rails aliases on Ruby 1.8.7 to Array#choice.

reidab/citizenry,reidab/citizenry,reidab/citizenry