test: add missing Cypress tests for calendar editor minDate

[ghiscoding]

• we never had any tests to verify that a date editor with minDate: 'today' option defined would not allow dates older than today to be clickable, this PR adds such test

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Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 99.8%. Comparing base (b43b53b) to head (f6229dc). Report is 1 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1734 +/- ## ====================================== Coverage 99.8% 99.8% ====================================== Files 187 187 Lines 30723 30723 Branches 9772 9772 ====================================== Hits 30634 30634 Misses 89 89 ```

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