popup: Make delete button primary

Delete is the primary action in the dialogue so it should be highlighted as such.

Author: jtojnar

wallabagger/popup.html

@@ -124,8 +124,8 @@ <h4 class="centered mt-10" data-i18n="Do_you_want_to_remove_this_article_permane
                 </div>
             </div>
             <div class="modal-footer">
-                <button class="btn btn-link" id="delete-article" data-i18n="Yes_delete_it">Yes, delete it</button>
-                <button class="btn btn-primary" id="cancel-confirmation" data-i18n="No_leave_it">No, leave it</button>
+                <button class="btn btn-error" id="delete-article" data-i18n="Yes_delete_it">Yes, delete it</button>
+                <button class="btn btn-link" id="cancel-confirmation" data-i18n="No_leave_it">No, leave it</button>
             </div>
         </div>
     </div>