feat: admin rendering UI + module configuration UI + UI fixes

client/components/admin/admin-utilities.vue

@@ -1,6 +1,7 @@
 <template lang='pug'>
   div
     v-card(flat, :color='$vuetify.dark ? "grey darken-4" : "grey lighten-5"').pa-3.pt-4
+      .admin-header-icon: v-icon(size='80', color='grey lighten-2') build
       .headline.primary--text Utilities
       .subheading.grey--text Maintenance and troubleshooting tools
     v-tabs(:color='$vuetify.dark ? "primary" : "grey lighten-4"', fixed-tabs, :slider-color='$vuetify.dark ? "white" : "primary"', show-arrows)