MDL-77712 core_course: Fix exception with inplace editor

* On fresh install, an exception is raised when we try to modify
the name of a newly inserted activity in the front page

course/amd/src/actions.js

@@ -82,6 +82,7 @@ define(
             TOGGLE: '.toggle-display,.dropdown-toggle',
             SECTIONLI: 'li.section',
             SECTIONACTIONMENU: '.section_action_menu',
+            SECTIONITEM: '[data-for="section_title"]',
             ADDSECTIONS: '.changenumsections [data-add-sections]',
             SECTIONBADGES: '[data-region="sectionbadges"]',
         };
@@ -981,7 +982,7 @@ define(
 
                 // The section and activity names are edited using inplace editable.
                 // The "update" jQuery event must be captured in order to update the course state.
-                $('body').on('updated', `${SELECTOR.SECTIONLI} [data-inplaceeditable]`, function(e) {
+                $('body').on('updated', `${SELECTOR.SECTIONLI} ${SELECTOR.SECTIONITEM} [data-inplaceeditable]`, function(e) {
                     if (e.ajaxreturn && e.ajaxreturn.itemid) {
                         const state = courseeditor.state;
                         const section = state.section.get(e.ajaxreturn.itemid);