Fix date range to reset calculatorIds

[Blackbaud-SteveBrush]

Issue: https://github.com/blackbaud/skyux-datetime/issues/42

[Blackbaud-AlexKingman]

🚀

[codecov]

Codecov Report

Merging #43 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master    #43   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files          26     26           
  Lines        1312   1311    -1     
  Branches      200    199    -1     
=====================================
- Hits         1312   1311    -1

Impacted Files	Coverage Δ
...s/date-range-picker/date-range-picker.component.ts	100% <100%> (ø)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 0b75c1b...1e0b831. Read the comment docs.