Normalize special characters in mega menu templates

views/css/megamenu.css

@@ -170,7 +170,7 @@
 }
 
 .adv-megamenu__manual-tree li.has-submenu > a::after {
-  content: '›';
+  content: '\203A';
   position: absolute;
   top: 50%;
   right: 0.15rem;

views/templates/hook/megamenu.tpl

@@ -198,7 +198,7 @@
                   <span class="adv-megamenu__mobile-main-link-label">{$child.title|escape:'htmlall':'UTF-8'}</span>
                 </a>
                 {if $child.children|count || $child.category_branch|count || $child.layouts|count || $child.type == 'rich_content'}
-                  <button type="button" class="js-adv-open-panel" data-target="adv-panel-{$child.id}">›</button>
+                  <button type="button" class="js-adv-open-panel" data-target="adv-panel-{$child.id}">&rsaquo;</button>
                 {/if}
               </div>
             </li>
@@ -329,7 +329,7 @@
       <div class="adv-megamenu__drawer">
         <div class="adv-megamenu__mobile-head">
           <span>{l s='Menu' d='Modules.Advancedmegamenu.Shop'}</span>
-          <button type="button" class="adv-megamenu__close js-adv-menu-close" aria-label="{l s='Close menu' d='Modules.Advancedmegamenu.Shop'}">×</button>
+          <button type="button" class="adv-megamenu__close js-adv-menu-close" aria-label="{l s='Close menu' d='Modules.Advancedmegamenu.Shop'}">&times;</button>
         </div>
 
         <div class="adv-megamenu__mobile-viewport">
@@ -341,7 +341,7 @@
                     <div class="adv-megamenu__mobile-link-row">
                       <a href="{$node.url|escape:'htmlall':'UTF-8'}" {if $node.new_window}target="_blank" rel="noopener"{/if}>{$node.title|escape:'htmlall':'UTF-8'}</a>
                       {if $node.children|count || $node.category_branch|count || $node.layouts|count || $node.type == 'rich_content'}
-                        <button type="button" class="js-adv-open-panel" data-target="adv-panel-{$node.id}">›</button>
+                        <button type="button" class="js-adv-open-panel" data-target="adv-panel-{$node.id}">&rsaquo;</button>
                       {/if}
                     </div>
                   </li>