Hide history comparison buttons if current obj and history obj are same.

ECOM-7854

course_discovery/static/js/publisher/disable-track-change-btns.js

+$(document).ready(function () {
+    // if current object and history object are same don't show the history changes buttons.
+    if ($('#id_history_revision').val()) {
+        $('.history').each(function () {
+            var element_id = this.id.split('_revision')[0];
+            var current_course_object = $('#' + element_id).val().trim();
+            var history_object_value = $(this).val().trim();
+
+            if (history_object_value === current_course_object) {
+                $(this).closest('div').find(".mce-history-changes").hide();
+            }
+        });
+    }
+});

course_discovery/templates/publisher/course_edit_form.html

@@ -631,6 +631,7 @@
     <script src="{% static 'js/publisher/decode-html.js' %}"></script>
 
     <script src="{% static 'js/publisher/modal-screen.js' %}"></script>
+    <script src="{% static 'js/publisher/disable-track-change-btns.js' %}"></script>
 
 {% endblock %}