[Bug]: Unchanged file asks to be saved in db perspective

### Apache Hop version?

2.20.0

### Java version?

OpenJDK 21

### Operating system

Linux

### What happened?

Starting the Hop GUI older SQL editor sessions are restored but they are marked as changed.
This causes them to ask to be saved when closing the GUI.
It's inconsistent behavior. It's best to reset the changed flag on these restored editors.

### Issue Priority

Priority: 3

### Issue Component

Component: Hop Gui

Start by reproducing the issue in Apache Hop 2.20.0 on Linux with older SQL editor sessions restored at GUI startup. Trace the Hop GUI restoration path for the database perspective and verify that restored editors no longer request saving when closed unless they were actually changed.

Written by the indexing model from the issue text.