As usual with JS issues, this needs to be tested in a variety of browsers, with JS consoles open. Open a course Turn editing on Drag + drop a couple of new files in place Confirm that the actionmenu is added correctly Confirm that the actionmenu opens as anticipated Confirm that you can toggle the show/hide without the page reloading Confirm that the group mode toggle works without the page reloading Confirm that the left and right indents work without the page reloading Ensure that the activity is not hidden Toggle hide on the section Confirm that the section hides Confirm that the activity is changed to be hidden too Unhide the section Confirm that the section unhides Confirm that the activity is changed to be visible too Hide the activity again Confirm that the activity is now hidden Toggle hide on the section Confirm that the section hides Confirm that the activity remains hidden Unhide the section Confirm that the section unhides Confirm that the activity remains hidden Drag/drop the activity into a different (unhidden) section Confirm that the activity remains hidden Unhide the activity Confirm that the activity becomes visible Drag it back into a hidden section Confirm that the activity becomes hidden Delete the activity Confirm that it is deleted without the page reloading