refactor(load-app-css): use registerModule instead of require.context

Author: sis0k0

Diff for: load-application-css.js

@@ -1,6 +1,7 @@
-const application = require("application");
-require("ui/styling/style-scope");
-const appCssContext = require.context("~/", false, /^\.\/app\.(css|scss|less|sass)$/);
-global.registerWebpackModules(appCssContext);
+const application = require("tns-core-modules/application");
+require("tns-core-modules/ui/styling/style-scope");
+
+global.registerModule("./app.css", () => require("~/app"));
+
 application.loadAppCss();