Add tool tip to group button in header menu

webapp/components/Group/GroupButton.vue

@@ -1,5 +1,19 @@
 <template>
   <div>
-    <nuxt-link to="/groups"><base-button icon="users" circle ghost /></nuxt-link>
+    <nuxt-link to="/groups">
+      <base-button
+        icon="users"
+        circle
+        ghost
+        v-tooltip="{
+          content: $t('group.button.tooltip'),
+          placement: 'bottom-start',
+        }"
+      />
+    </nuxt-link>
   </div>
 </template>
+
+<script>
+export default {}
+</script>

webapp/locales/de.json

@@ -410,6 +410,9 @@
     "addUserNoOptions": "Keine Nutzer gefunden!",
     "addUserPlaceholder": "Benutzername",
     "allGroups": "Alle Gruppen",
+    "button": {
+      "tooltip": "Gruppen anzeigen"
+    },
     "categories": "Thema ::: Themen",
     "changeMemberRole": "Die Rolle wurde auf „{role}“ geändert!",
     "contentMenu": {

webapp/locales/en.json

@@ -410,6 +410,9 @@
     "addUserNoOptions": "No users found!",
     "addUserPlaceholder": " Username",
     "allGroups": "All Groups",
+    "button": {
+      "tooltip": "Show groups"
+    },
     "categories": "Topic ::: Topics",
     "changeMemberRole": "The role has been changed to “{role}”!",
     "contentMenu": {