How to delete items entries in a listbox in appdesigner

We have a listbox with multiple entries, and would want to be able to remove selected entries, for which we though we could use the mouse rifght button, as we had this functionalty already implemented when we used guide to build this UI. It was working well, but we are now updating the UI for appdesigner (seems not to work in appdesigner this right click mouse action)

We may consider other possible ways to be able to remove selected listbox entries besides the right mouse click action.

Thanks in advance