Refactored some methods in calendar module:
- move methods into own file
- dont call shorten method from titelTransform because why? just call
them after each other.
- added tests for util methods
- cleaned up other tests
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Co-authored-by: veeck <michael@veeck.de>
first PR for #2942
- added new electron tests for calendar which test new css classes from
https://github.com/MichMich/MagicMirror/pull/2939
- moved some compliments tests from `e2e` to `electron` because of date
mocking
- removed mock stuff from compliments module
