A better workaround for Popper issue

skins/elastic/templates/includes/footer.html

@@ -7,8 +7,7 @@
 
 <roundcube:object name="message" id="messagestack" />
 
-<script src="/bootstrap/popper.min.js"></script>
-<script src="/bootstrap/bootstrap.min.js"></script>
+<script src="/bootstrap/bootstrap.bundle.min.js"></script>
 <script src="/ui.js"></script>
 
 </body>

skins/elastic/ui.js

@@ -1836,6 +1836,7 @@ function rcube_elastic_ui()
                 trigger: $(item).data('popup-trigger') || 'click',
                 placement: $(item).data('popup-pos') || 'bottom',
                 animation: true,
+                boundary: 'window', // fix for https://github.com/twbs/bootstrap/issues/25428
                 html: true
             })
             .on('show.bs.popover', function(event) {