[Bug]: Simple Mapping parameters are lost during Kettle Import

### Apache Hop version?

2.10.0

### Java version?

22

### Operating system

Linux

### What happened?

Parameters present in the parameters tab of a Kettle Simple Mapping are not more present after import. The expected behaviour would be that the parameters are still present.

### Issue Priority

Priority: 2

### Issue Component

Component: Hop Gui

Reproduce the import in Apache Hop 2.10.0 with a Kettle Simple Mapping that has parameters in its parameters tab, then trace the Hop GUI Kettle import path that handles Simple Mapping parameters. Done means the imported mapping retains the parameters; no file or test is named in the issue.

Written by the indexing model from the issue text.