IgxDatePicker throws error when open its date view on Ivy.

[skrustev]

Description

Opening the date view of the data picker (either dialog or dropdown) throws error because the value of the selectedDate is null when trying to focus the value in the editor.

• igniteui-angular version: 9.0.x
• browser: any

Steps to reproduce

1. Open a date picker sample using Ivy
2. Click on the date picker icon to open dialog/dropdown

Result

Error is thrown and the selected date is not highlighted.

Expected result

There should be no errors and the selected date should be highlighted.