Material Theme broken on feat/material-theme branch

[pasadyaguy]

Issue type

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

• [x ] bug report
• feature request
• question about the decisions made in the repository

Issue description

The material-theme branch is not correctly importing the material theme and controls are not displaying properly. Upon checkout of the feat/material-theme branch and running npm install and ng serve the material theme throws a console warning.

When navigating to the /forms/inputs section to verify, the form controls are missing the styles.

This is also the case when going to the public demo page: https://www.akveo.com/ngx-admin/pages/forms/inputs

Current behavior:
Material Theme is not applying styles

Expected behavior:
Material Theme style should be imported and applied to controls and other material items.

Steps to reproduce:
Go to https://www.akveo.com/ngx-admin/pages/forms/inputs and see the issue

OR

1. Checkout latest from feat/material-theme
2. Run npm install
3. Run ng serve
4. Navigate to Forms > Form Inputs
   You will see the material theme is not showing the dropdowns, inputs, and other controls properly.

[pasadyaguy]

@denStrigo tagging for visibility.