FTP Synchronization dialog does not close automatically even when "Close Automatically On Success" is checked

### Apache NetBeans version

Apache NetBeans 28

### What happened

The "Synchronization" dialog box, which appears after performing an FTP/Remote synchronization, fails to close automatically upon successful completion. This occurs even when the checkbox "Close Automatically On Success" is explicitly checked.

This issue has been persistent across multiple NetBeans versions (at least 5 different versions tested), suggesting a long-standing bug in the UI handling of this specific dialog.

### Language / Project Type / NetBeans Component

_No response_

### How to reproduce

**Steps to Reproduce:**

- Set up a PHP project with FTP/Remote synchronization.
- Perform a "Sync" or "Upload" operation that triggers the Synchronization progress dialog.
- Check the box "Close Automatically On Success".
- Wait for the synchronization to finish successfully.

**Actual Result:**
The dialog stays open with the message "Synchronization successfully finished." The user must manually click the "OK" button to dismiss it.

**Expected Result:**
The dialog should close automatically as soon as the progress reaches 100% and the "Success" message is triggered, provided the checkbox is enabled.

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

Apache NetBeans 24 or earlier

### Operating System

System: Windows 11 version 10.0 running on amd64; UTF-8; en_US (nb)

### JDK

Java: 25.0.1; OpenJDK 64-Bit Server VM 25.0.1+8-LTS

### Apache NetBeans packaging

Community provided installer

### Anything else

_No response_

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

No

Start by reproducing the FTP/Remote synchronization flow in a PHP project and observe the Synchronization progress dialog with "Close Automatically On Success" enabled. Trace the dialog entry point and success completion path, then verify that a successful 100% synchronization closes the dialog automatically while preserving the manual OK behavior when the option is disabled.

Written by the indexing model from the issue text.