Tooltip occluded by heavyweight editor component

### Description

When a navigator element displays a tooltip that intersects a component displaying a heavyweight component, the tooltip is occluded by the heavyweight component. This code comment indicates an API should be created to handle this situation. https://github.com/emilianbold/netbeans-releases/blob/2fd6dc84c187e3c79a959b3ddb4da1a9703659c7/openide.explorer/src/org/openide/explorer/view/CustomPopupFactory.java#L94-L96

### Use case/motivation

Change getPopup() detects if the popup intersects a heavyweight component and act appropriately.

### Related issues

_No response_

### Are you willing to submit a pull request?

No

Start with openide.explorer/src/org/openide/explorer/view/CustomPopupFactory.java, especially the comment near line 94 and the getPopup() method. Determine the API needed when a popup intersects a heavyweight component, then verify that getPopup() handles the situation appropriately.

Written by the indexing model from the issue text.