dep: remove font-awesome-webpack

The commit removes `font-awesome-webpack` as a dependency since:
- the dependency was outdated
- the dependency is no longer maintained
- the dependency has high security vulnerabilities
- the dependency does not support newer versions of webpack

The change now uses the already used `css-loader` and `url-loader` to
load font-awesome icons and fonts.

Signed-off-by: vince-fugnitto <vincent.fugnitto@ericsson.com>

dev-packages/application-manager/package.json

@@ -42,7 +42,6 @@
     "copy-webpack-plugin": "^8.1.1",
     "css-loader": "^6.2.0",
     "electron-rebuild": "^1.8.6",
-    "font-awesome-webpack": "0.0.5-beta.2",
     "fs-extra": "^4.0.2",
     "ignore-loader": "^0.1.2",
     "less": "^3.0.3",