LP1830912 Locally servered material icons

LP1830912 Locally servered material icons

Adds the material-icons NPM package and teaches the Angular code to
import the icons at build time instead of fetching the icons from the
Google servers.

Two existing icons were swapped with alternate icons to avoid odd
spacing issues with the locally served versions.

Note 'npm install' is required to pick up the new icons package.

Signed-off-by: Bill Erickson <berickxx@gmail.com>
Signed-off-by: Galen Charlton <gmc@equinoxinitiative.org>