Popper events are emitted even if popper is disabled

[pdesmarais]

Description of the bug Popper events are emitted even if popper is disabled

To Reproduce

1. Add a handler to the open:popper event
2. Set the popper's disabled to true
3. Click or hover on the popper's trigger
4. open:popper event handler gets executed

Expected behavior Events should not be triggered or emitted when popper is disabled