Resolve "Sprach-Icons auf Loginseite haben keine festgelegte Größe"

Closes #2634

Merge request studip/studip!1797

resources/assets/stylesheets/scss/index.scss

@@ -79,17 +79,7 @@ $gap-between-boxes: calc($login-page-margin / 2);
     footer {
         overflow: auto;
 
-        #languages {
-            border-top: 1px solid $light-gray-color;
-            font-size: 0.9em;
-            padding: 10px;
-
-            a {
-                padding-right: 10px;
-            }
-        }
-
-        #contrast {
+        #languages, #contrast {
             display: flex;
             align-items: center;
             gap: 5px;

templates/index_nobody.php

@@ -65,8 +65,8 @@ if ($bg_mobile) {
 
             <div id="languages">
                 <? foreach ($GLOBALS['INSTALLED_LANGUAGES'] as $temp_language_key => $temp_language): ?>
+                    <?= Assets::img('languages/' . $temp_language['picture'], ['alt' => $temp_language['name'], 'size' => '24']) ?>
                     <a href="index.php?set_language=<?= $temp_language_key ?>">
-                        <?= Assets::img('languages/' . $temp_language['picture'], tooltip2($temp_language['name'])) ?>
                         <?= htmlReady($temp_language['name']) ?>
                     </a>
                 <? endforeach; ?>