Call phone numbers WITH TBDialOut
While Chris Hastie was kind enough to port his fabulous TBDialOut to actual Thunderbird verisons (https://github.com/tipichris/TBDialOut/issues/10) we're missing a "click to dial" function in cardbook, that integrates, incorporates or connects to TBDialOut. That would bring best flexibility to all users and chains one of the best TB addons IMHO.