ngb-timepicker - after entering time values into input fields the on blur event doesn't work on Ms-Edge 16-18

[brabenetz]

Reopened from: #3621

Microsoft Edge 44.17763.831.0
Microsoft EdgeHTML 18.17763

This can be reproduced on every example of the ng-bootstrap example-page:
https://ng-bootstrap.github.io/#/components/timepicker/examples

I tested following ng-bootstrap versions
✓ 4.1.1
✓ 4.2.2
- 5.0.0 ( compile errors: Couldn't resolve original symbol for ./datepicker/adapters/ngb-date-adapter ...)
✓ 5.1.0
✓ 5.1.5
X 5.2.0
X 5.2.1
X 5.2.3
- 6.0.0 ( compile errors (e.g.: error TS1086: An accessor cannot be declared in an ambient context.)

In other words:
It worked until Version 5.1.5 also in MS Edge 18.
Since version 5.2.0 it is broken.
6.0.0 I couldn't test because of breaking changes.

I also tested https://ng-bootstrap.github.io/#/components/timepicker/examples on multiple Ms Edge Browsers:
X EdgeHTML 18
X EdgeHTML 17
X EdgeHTML 16
✓ EdgeHTML 15

Since Ms-Edge version 16 (before Chromium) the current ng-bootstrap timepicker doesn't work anymore. It worked with EdgeHTML version 15.