[FIX] website_slides: fix UI glitch when adding like/dislike to slide

Task #1923443

Purpose
=======

When adding a like/dislike to a slide, the like/dislike counter was not properly updated.

partly closes #29901

closes odoo/odoo#30027

addons/website_slides/static/src/js/slides.js

@@ -55,7 +55,7 @@ var page_widgets = {};
             if(is_public){
                 this.popover_alert(button, _.str.sprintf(_t('Please <a href="/web?redirect=%s">login</a> to vote this slide'), (document.URL)));
             }else{
-                var target = button.find('.fa');
+                var target = button.find('.o_wslides_like_dislike_count');
                 if (local_storage.getItem('slide_vote_' + slide_id) !== user_id.toString()) {
                     ajax.jsonRpc(href, 'call', {slide_id: slide_id}).then(function (data) {
                         target.text(data);

addons/website_slides/views/website_slides.xml

@@ -462,7 +462,7 @@
                                             tabindex="0"
                                             data-toggle="popover">
                                             <i class="fa fa-thumbs-up fa-1x" role="img" aria-label="Likes" title="Likes"/>
-                                            <t t-esc="slide.likes"/>
+                                            <span class="o_wslides_like_dislike_count" t-esc="slide.likes"/>
                                         </span>
                                         <span
                                             class="oe_slide_js_unlike"
@@ -473,7 +473,7 @@
                                             tabindex="0"
                                             data-toggle="popover">
                                             <i class="fa fa-thumbs-down fa-1x" role="img" aria-label="Dislikes" title="Dislikes"/>
-                                            <t t-esc="slide.dislikes"/>
+                                            <span class="o_wslides_like_dislike_count" t-esc="slide.dislikes"/>
                                         </span>
                                     </div>
                                 </div>