* fix(electron): disable webSecurity in dev mode to suppress CORS preflights
* feat(CalDAV): Option to import sub-tasks along with parent
* test(CalDAV): Adds specs for option to import subtasks along with parent
* doc(CalDAV): Adds notion on automatic sub-task import
* feat(CalDAV): Handles grandchildren and ignores subtasks of archived tasks.
* fix(setup): removes policy violating code
* fix(caldav):_resolve N+1 issue
* test(caldav):_adds more tests
* fix(electron):_fix task-widget mock in electron test