Small fixes

app/assets/stylesheets/admin/design-system/typography.sass

 h1,
 h2
     font-family: $font-family-serif
-    // Pourquoi ?
-    // font-kerning: none
 
 h6, .h6, h5, .h5, h4, .h4, h3, .h3, h2, .h2, h1, .h1
     font-weight: normal
@@ -20,7 +18,7 @@ p
     text-transform: uppercase
 
 a
-    text-decoration-style: none
+    text-decoration: none
     text-decoration-thickness: 1px
     text-underline-offset: 4px
     transition: text-decoration 0.5s, color 0.5s

app/assets/stylesheets/commons/_summernote.sass

@@ -49,7 +49,7 @@
                     padding-left: 2px
                 a
                     color: $color-flexoki-blue-a11y
-                    text-decoration-style: solid
+                    text-decoration: underline 1px
                 img,
                 video
                     height: auto

app/views/admin/application/l10n/_libre_translate_button.html.erb

@@ -16,8 +16,4 @@
       <%= t('admin.translation.done') %>
     </span>
   </span>
-<% else %>
-  <a class="btn btn-light btn-xs disabled" disabled>
-    <%= t('admin.translation.unavailable_button') %>
-  </a>
 <% end %>