Non-closable TopComponent still closable via middle-click button

### Apache NetBeans version

Apache NetBeans 25

### What happened

A (non-editor) TopComponent with client property `TopComponent.PROP_CLOSING_DISABLED=true` is displayed as a tab with no _close_ button and no _close_ menu entry. This is OK.

But actually it is still closable via mouse middle-click on the tab.

### Language / Project Type / NetBeans Component

Netbeans platform application

### How to reproduce

Add a TopComponent to a NB platform app.

Add `putClientProperty(TopComponent.PROP_CLOSING_DISABLED, Boolean.TRUE); `in constructor.

Run, middle-click tab name (possibly several times), TopComponent is closed.

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

No / Don't know

### Operating System

Win 11

### JDK

Adoptium 23

### Apache NetBeans packaging

Apache NetBeans binary zip

### Anything else

It seems problem comes from: https://github.com/apache/netbeans/blob/master/platform/core.windows/src/org/netbeans/core/windows/view/ui/CloseButtonTabbedPane.java, see MouseListener at the beginning.

I tried setting client property `TabbedPaneFactory.NO_CLOSE_BUTTON` to true in my TopComponent, so that `hideCloseButton()` returns true and blocks the call to `fireCloseRequest()` in `mouseReleased()`, but it did not work. I could not debug from my config so I stopped there.

I found an easy workaround by overriding `TopComponent.canClose()` to return false.

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

No

Start in platform/core.windows/src/org/netbeans/core/windows/view/ui/CloseButtonTabbedPane.java, especially the MouseListener and its mouseReleased handling. Reproduce the issue in a NetBeans Platform application with a TopComponent using PROP_CLOSING_DISABLED and middle-click the tab. Done means middle-click no longer closes that TopComponent while normal closable tabs retain their behavior.

Written by the indexing model from the issue text.