Added Angular Material purple / amber theme, so that the icons would be displayed properly

Author: elze

angular.json

@@ -23,7 +23,8 @@
               "src/assets"
             ],
             "styles": [
-              "src/styles.css"
+              "./node_modules/@angular/material/prebuilt-themes/deeppurple-amber.css",
+              "src/styles.scss"
             ],
             "scripts": []
           },
@@ -72,6 +73,7 @@
             "tsConfig": "src/tsconfig.spec.json",
             "karmaConfig": "src/karma.conf.js",
             "styles": [
+              "./node_modules/@angular/material/prebuilt-themes/deeppurple-amber.css",
               "styles.css"
             ],
             "scripts": [],

src/styles.css

@@ -0,0 +1,9 @@
+/* Add application styles & imports to this file! */
+html,
+body {
+  height: 100%;
+}
+body {
+  margin: 0;
+  font-family: Roboto, "Helvetica Neue", sans-serif;
+}