Resolve "Verify maintenance mode with GraphQL / reimplement maintenance mode handling"

Closes #785 (closed)

aleksis/core/frontend/components/app/SideNav.vue

@@ -11,7 +11,9 @@
         </a>
       </v-list-item>
       <v-list-item class="search">
-        <sidenav-search />
+        <sidenav-search
+          :disabled="systemProperties.maintenanceMode"
+        />
       </v-list-item>
       <v-list-item-group :value="$route.name" v-if="sideNavMenu">
         <div v-for="menuItem in sideNavMenu" :key="menuItem.name">
@@ -33,6 +35,7 @@
               :target="subMenuItem.newTab ? '_blank' : '_self'"
               :key="subMenuItem.name"
               :value="subMenuItem.name"
+              :disabled="systemProperties.maintenanceMode"
             >
               <v-list-item-icon>
                 <v-icon v-if="subMenuItem.icon">{{ subMenuItem.icon }} </v-icon>
@@ -48,6 +51,7 @@
             :to="{ name: menuItem.name }"
             :target="menuItem.newTab ? '_blank' : '_self'"
             :value="menuItem.name"
+            :disabled="systemProperties.maintenanceMode && !menuItem.defaultRoute"
           >
             <v-list-item-icon>
               <v-icon v-if="menuItem.icon">{{ menuItem.icon }}</v-icon>