[NAE-2099] MenuItemService.appendChildCaseIdInDataSet not setting hasChildren correctly

[martinkranec]

Description

Fixes the condition for setting the field hasChildren correctly. Added condition to check if newValue is not empty.

Fixes NAE-2099

Dependencies

No new dependencies were introduced

Third party dependencies

No new dependencies were introduced

Blocking Pull requests

There are no dependencies on other PR

How Has Been This Tested?

Manually on an already existing project.

Test Configuration

Name	Tested on
OS	Windows 11
Runtime	Oracle OpenJDK 11.0.25
Dependency Manager	Maven 3.9.9
Framework version	Spring Boot 2.7.18
Run parameters
Other configuration

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• My changes have been checked, personally or remotely, with @...
• I have commented my code, particularly in hard-to-understand areas
• I have resolved all conflicts with the target branch of the PR
• I have updated and synced my code with the target branch
• I have added tests that prove my fix is effective or that my feature works
• New and existing tests pass locally with my changes:
  • Lint test
  • Unit tests
  • Integration tests
• I have checked my contribution with code analysis tools:
  • SonarCloud
  • Snyk
• I have made corresponding changes to the documentation:
  • Developer documentation
  • User Guides
  • Migration Guides

[Retoocs]

good job for finding it, thanks!