PR depends on this one to be release first: NativeScript/NativeScript#7679

PR Checklist

• The PR title follows our guidelines: https://github.com/NativeScript/NativeScript/blob/master/CONTRIBUTING.md#commit-messages.
• There is an issue for the bug/feature this PR is for. To avoid wasting your time, it's best to open a suggestion issue first and wait for approval before working on it.
• You have signed the CLA.
• All existing tests are passing: https://github.com/NativeScript/nativescript-angular/blob/master/DevelopmentWorkflow.md#running-the-tests
• Tests for the changes are included. (as this is an issue only observed during HMR there is no way to add an unit test for it in this repo)

What is the current behavior?

Any opened modal views are not updated or closed during HMR livesync

What is the new behavior?

Any opened modal views are closed during HMR livesync

Fixes/Implements/Closes #[Issue Number].
#1854