Focussed Element Underscore Not Styling

[nickamckenna]

Which template:

• MaterialDesignFrameworkModule — Material Design
• Bootstrap3FrameworkModule — Bootstrap 3
• Bootstrap4FrameworkModule — Bootstrap 4
• NoFrameworkModule — plain HTML
• Other (please specify below)

A clear and concise description of what the bug is.

To Reproduce
When selecting a new control in a form, the control does not get the expected focussed Angular styling. You can see this on the demo page:

https://hamidihamza.com/Angular6-json-schema-form/?set=ng-jsf&example=ng-jsf-flex-layout&framework=material-design&language=en

Try clicking in any of the generated text fields and the expected "blueish" underscore does not appear.

Expected behavior
The correct Angular focussed styling should be applied.

Screenshots

Desktop (please complete the following information):

• OS: Windows 10
• Browser: Chrome
• Version: 70.0.3538.102

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