add config and move components

src/components/OpenerButton.vue

@@ -0,0 +1,32 @@
+<!--
+@license GNU AGPL version 3 or any later version
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as
+published by the Free Software Foundation, either version 3 of the
+License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+-->
+<template>
+  <button class="side-menu-opener" :arial-label="label">
+    <span v-text="label"></span>
+  </button>
+</template>
+
+<script>
+export default {
+  name: 'OpenerButton',
+  data() {
+    return {
+      label: t('side_menu', 'Toggle the menu'),
+    }
+  }
+}
+</script>