Cross UTC time fix

[kenzal]

Update calendarfetcherutils.js to force recurrence date time to be the same as event datetime

I found an issue with one of my calendars displaying the wrong time for certain recurring events. Each event was set up by someone in a different timezone (Central European) than my own (Eastern US). I traced the issue back to the Rrule.between() method generating odd time portions under certain circumstances.

The fix I found was to set the UTC time portion of the recurrence datetime to be the same as the UTC time portion of the event start date.

This resolved the issues with the maladjusted event times, and had no effect on other event times. While there may be edge cases that are affected, I have been unable to locate any.

[codecov-commenter]

Codecov Report

Merging #3175 (b27f1e0) into develop (9d49196) will increase coverage by 0.16%.
The diff coverage is 100.00%.

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@@             Coverage Diff             @@
##           develop    #3175      +/-   ##
===========================================
+ Coverage    26.15%   26.31%   +0.16%     
===========================================
  Files           53       53              
  Lines        11502    11505       +3     
===========================================
+ Hits          3008     3028      +20     
+ Misses        8494     8477      -17     

Files Changed	Coverage Δ
modules/default/calendar/calendarfetcherutils.js	68.75% <100.00%> (+1.31%)	⬆️

... and 2 files with indirect coverage changes