Dashboard - fix accessibility focus state on nav Dropdown + Logout

src/components/Dashboard.svelte

@@ -152,6 +152,7 @@
       </a>
       <div>
         <div
+          tabindex="0"
           class:bg-gray-100={activePage === 'blub'}
           class="flex items-center justify-between px-4 py-3 transition cursor-pointer group hover:bg-gray-100 hover:text-gray-900"
           role="button"
@@ -259,6 +260,7 @@
         <span>{$_('about')}</span>
       </a>
       <span
+        tabindex="0"
         class="flex items-center px-4 py-3 transition cursor-pointer group hover:bg-gray-100 hover:text-gray-900"
         on:click={() => {
           logout();