styling small changes

frontend/src/layouts/default/AppBar.vue

@@ -1,6 +1,7 @@
 <template>
   <v-app-bar :elevation="5">
     <v-icon v-if="isMobile" icon="mdi-menu" @click="$emit('toggleDrawer')" />
+    <span v-else style="width: 24px"></span>
     <v-app-bar-title :text="$t(<string>$router.currentRoute.value.name)" class="align-center text-center " />
     <v-btn prepend-icon="mdi-content-save" v-if="stateChange" :text="$t('actions.save')" @click="saveChanges"></v-btn>
     <v-icon icon="mdi-theme-light-dark" @click="toggleTheme()" style="margin: 0 10px;"></v-icon>