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• 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.
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• All existing tests are passing: https://github.com/NativeScript/nativescript-angular/blob/master/DevelopmentWorkflow.md#running-the-tests
• Tests for the changes are included.

I ran the appium tests but it couldn't hurt to double check these too. In addition to this, I have also provided a test in the test-app-ng application.

Manually tested on both iOS and Android.

What is the current behavior?

In a class with a member that contains an array of SegmentedBarItems, using this to populate a SegmentedBar in a listView.

When the listView has scrolled below the view of the SegmentedBar and the items driving the listView change, scrolling back to the SegmentedBar causes a hard crash on Android.

What is the new behavior?

Introduce a simple check as to whether a new value on setPropertyInternal is an array, if so, check and unreference any of the items references to a parent & parentNode.

The demo page contains a simple list containing a SegmentedBar as an item, scrolling to the bottom of the list reveals a button that triggers the effect being fixed here. Press this and the list will change, then attempt to scroll to the top of the list.
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Fixes #900