Memory Leak With Popover Component

### Description

On popover unmount, the state is being changed resulting in a memory leak warning.

### Reproduce Steps

We ran into it when the unmount lifecycle event fires, while simultaneously clicking a button (example: clicking a cancel button).

### Error Trace (if possible)


### Solution

Fix: there is a click event attached to the document that closes the popover if clicking outside of the popover. This logic needs to be handled differently.

### Additional Information

Like I said earlier: This occurs when clicking anywhere on the document while the popover component is/did unmount.