Gravity Perks - Comment Blocklist 1.3.8

Added support for automatically converting old "blacklist" settings to "blocklist" settings. (#11)

Fixed an issue where GPBL caused a fatal error when Gravity Forms is deactivated first.
Added support for Gravity Forms 2.5.

Fixed an issue where specific blacklisted words may fail form submission due to being in the user-agent.
Added gpcb_validate_user_agent filter.
Fixed issue where the "Blacklist Validation" setting would not show under the "Legacy" section in Gravity Forms 2.5 and newer.