nb-select doesn't deselect option when resetting ngModel

[frankie567]

Issue type

I'm submitting a ... (check one with "x")

• bug report
• feature request

Issue description

Current behavior:

After having selected an option with nb-select, if the binded ngModel is resetted (null or undefined value) by the component, the option is still selected in the nb-select.

Expected behavior:

After having selected an option with nb-select, if the binded ngModel is resetted (null or undefined value) by the component, the option should be unselected in the nb-select.

Steps to reproduce:

• Define a data model in the component.
• Bind it to a nb-select in the template.
• Create a button that resets the data model to null on click.
• Select an option in nb-select.
• Click on the button.

Related code:

https://stackblitz.com/edit/github-naqwyy

Other information:

• npm: 6.4.1
• node: 10.15.0
• macOS 10.14.2
• Chrome 72

Angular, Nebular

• @angular/core: 7.1.4
• @angular/forms: 7.1.4
• @nebular/theme: 3.3.0

[aefox]

Fix provided in #1265 (will require discussion and if approved adding some tests)

[aefox]

Fix provided in #1282

[yggg]

Closing as fix (#1282) was merged

[TeodorKolev]

This is not fixed at version 3.1.0 that we are using...