MDL-65539 dragdrop: Allow sections and blocks to move to the top

Before this change sections and blocks could not be moved to be the
top item when using keyboard drag and drop.

They can now be moved to the top in one action.

The way they move using keyboard drag and drop has changed when they
are below the item they are dropped on, not instead of appearing
below it they will be placed above it.

course/yui/build/moodle-course-dragdrop/moodle-course-dragdrop-debug.js

@@ -48,6 +48,8 @@ Y.extend(DRAGSECTION, M.core.dragdrop, {
         this.groups = [CSS.SECTIONDRAGGABLE];
         this.samenodeclass = M.course.format.get_sectionwrapperclass();
         this.parentnodeclass = M.course.format.get_containerclass();
+        // Detect the direction of travel.
+        this.detectkeyboarddirection = true;
 
         // Check if we are in single section mode
         if (Y.Node.one('.' + CSS.JUMPMENU)) {

course/yui/build/moodle-course-dragdrop/moodle-course-dragdrop.js

@@ -48,6 +48,8 @@ Y.extend(DRAGSECTION, M.core.dragdrop, {
         this.groups = [CSS.SECTIONDRAGGABLE];
         this.samenodeclass = M.course.format.get_sectionwrapperclass();
         this.parentnodeclass = M.course.format.get_containerclass();
+        // Detect the direction of travel.
+        this.detectkeyboarddirection = true;
 
         // Check if we are in single section mode
         if (Y.Node.one('.' + CSS.JUMPMENU)) {

course/yui/src/dragdrop/js/section.js

@@ -16,6 +16,8 @@ Y.extend(DRAGSECTION, M.core.dragdrop, {
         this.groups = [CSS.SECTIONDRAGGABLE];
         this.samenodeclass = M.course.format.get_sectionwrapperclass();
         this.parentnodeclass = M.course.format.get_containerclass();
+        // Detect the direction of travel.
+        this.detectkeyboarddirection = true;
 
         // Check if we are in single section mode
         if (Y.Node.one('.' + CSS.JUMPMENU)) {

lib/yui/build/moodle-core-blocks/moodle-core-blocks-debug.js

@@ -458,6 +458,8 @@ MANAGER.prototype = {
         this.groups = ['block'];
         this.samenodeclass = CSS.BLOCK;
         this.parentnodeclass = CSS.BLOCKREGION;
+        // Detect the direction of travel.
+        this.detectkeyboarddirection = true;
 
         // Add relevant classes and ID to 'content' block region on Dashboard page.
         var myhomecontent = Y.Node.all('body#' + CSS.MYINDEX + ' #' + CSS.REGIONMAIN + ' > .' + CSS.REGIONCONTENT);