- Fix Title is required by making Checklist title optional.
- Fix Title is required by making Checklist title optional.

Thanks to centigrade-kdk and xet7 !

Closes #1576,
closes #1753

GhassenRjab/wekan,GhassenRjab/wekan,libreboard/libreboard,wekan/wekan,libreboard/libreboard,wekan/wekan,wekan/wekan,wekan/wekan,wekan/wekan,GhassenRjab/wekan