The code completion popup overlay cannot display items correctly when user scroll up/down the list.

### Apache NetBeans version

Apache NetBeans 13

### What happened

The code completion popup window may not function right when the window shows up near the bottom edge of the Netbeans IDE's window.

### How to reproduce

This issue is really weird. We can reproduce it ONLY in a particular situation.

1. Activate the Look and Feel - `FlatLaf Light`.

2. Coding in Java.

3. Make a statement close to the bottom edge of the Netbeans IDE's window. For example, the statement may look like the following:
```Java
String str = new String();
str.
```

4. Move your caret to the line `str.` and behind the dot.

5. Press `ctrl+\` to call out the code completion popup window.

6. Scroll back and forth the "Option list" by Arrow_DOWN or mouse scrolling wheel or dragging the scroll bar of the Option list.
Then, you will see the Option list could be stuck and don't get refreshed anymore.

Note:
1. If you switch the Look and Feel to the `Windows` one, everything will be fine.
2. The issue only occurs when the first entry in the Option list has a JavaDoc. Everything goes fine If the first entry coming to the Option list doesn't have a JavaDoc(I mean, no need to popup the JavaDoc window).

### Did this work correctly in an earlier version?

Apache NetBeans 12.6

### Operating System

Win10 pro 64bit

### JDK

Oracle JDK 11.0.8

### Apache NetBeans packaging

Apache NetBeans provided installer

### Anything else

_No response_

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

No

### Code of Conduct

Yes

Start by reproducing the issue in Apache NetBeans 13 on Windows 10 with FlatLaf Light, Java code, the completion popup near the window bottom, and a first entry with JavaDoc. Exercise the option list with arrow keys, mouse-wheel scrolling, and scrollbar dragging. Done means the list continues refreshing correctly in this situation, while the Windows look and feel and no-JavaDoc cases remain unaffected.

Written by the indexing model from the issue text.