Author: Dongsheng Cai
MDL-71790 calendar: Create a new calendar import page
The commit was originally from MDL-71808
http://git.moodle.org/gw?p=moodle.git;a=commit;h=ff035c0aa73bc249ed94ce179bee8b33f6940d32
http://github.com/moodle/moodle/commit/ff035c0aa73bc249ed94ce179bee8b33f6940d32
+ 4.0 en [calendarsubscriptions,core_calendar]