[Bug]: File explorer shows blank rows when expanding/collapsing folders after scoped refresh

[leehaut]

Apache Hop version?

2.19.0-SNAPSHOT

Java version?

jdk21

Operating system

Windows

What happened?

Description

In the File Explorer perspective, expanding or collapsing folders (including Expand All / Collapse All) can show blank/empty rows under folder nodes.

Steps to reproduce

1. Open Hop GUI and a project with nested folders in File Explorer (default lazy-loading depth is fine).
2. Select a folder (so scoped refresh remembers lastSelectedFolderPath).
3. Refresh (F5) and/or expand/collapse folders, or use Expand All.
4. Observe blank rows under some expanded folders (no name/icon; occupies one tree row).

Issue Priority

Priority: 3

Issue Component

Component: Hop Gui

[leehaut]

.take-issue