Avoid overflow when drop down menu being aligned to the right

main/inc/lib/display.lib.php

@@ -2032,14 +2032,18 @@ class Display
 
     /**
      * @todo use twig
+     * @param string $title
+     * @param array $elements
+     * @param bool $alignToRight
+     * @return string
      */
-    public static function groupButtonWithDropDown($title, $elements)
+    public static function groupButtonWithDropDown($title, $elements, $alignToRight = false)
     {
         $html = '<div class="btn-group">
                 <button class="btn btn-default dropdown-toggle" data-toggle="dropdown">
                 '.$title.'
                 <span class="caret"></span></button>
-                <ul class="dropdown-menu">';
+                <ul class="dropdown-menu ' . ($alignToRight ? 'dropdown-menu-right' : '') . '">';
         foreach ($elements as $item) {
             $html .= Display::tag('li', Display::url($item['title'], $item['href']));
         }

main/lp/learnpath.class.php

@@ -5929,7 +5929,7 @@ class learnpath
                     ])
                 ),
             );
-            $actionsRight = Display::groupButtonWithDropDown(get_lang('PrerequisitesOptions'), $buttons);
+            $actionsRight = Display::groupButtonWithDropDown(get_lang('PrerequisitesOptions'), $buttons, true);
         }
 
         $toolbar = Display::toolbarAction('actions-lp-controller', array($actionsLeft, $actionsRight));