Resolve "Finalise Vuetify app as SPA"

Closes #759 (closed)

aleksis/core/assets/components/about/InstalledAppsList.vue

-<template>
-  <ApolloQuery :query="gqlInstalledApps">
-    <template #default="{ result: { error, data }, isLoading }">
-      <v-row v-if="isLoading">
-        <v-col
-          v-for="idx in 3"
-          :key="idx"
-          cols="12"
-          md="6"
-          lg="6"
-          xl="4"
-          class="d-flex align-stretch"
-        >
-          <v-card class="d-flex flex-column flex-grow-1 pa-4">
-            <v-skeleton-loader
-              type="heading, actions, text@5"
-            ></v-skeleton-loader>
-          </v-card>
-        </v-col>
-      </v-row>
-      <v-row v-if="data.installedApps">
-        <installed-app-card
-          v-for="app in data.installedApps"
-          :key="app.name"
-          :app="app"
-        />
-      </v-row>
-    </template>
-  </ApolloQuery>
-</template>
-
-<script>
-import InstalledAppCard from "./InstalledAppCard.vue";
-import gqlInstalledApps from "./installedApps.graphql";
-
-export default {
-  name: "InstalledAppsList",
-  components: { InstalledAppCard },
-};
-</script>