[elsa] fix(JadeReferenceTreeSelect): Force reference updates on same selection

[RonnyChan96]

This PR fixes an issue in JadeReferenceTreeSelect where reference updates were being skipped when selecting the same value, particularly affecting cross-application node copying scenarios.

Problem
Previously, when:

1. Copying nodes between applications
2. Selecting the same reference value again
   The component would skip updates if selected === reference.referenceId, leading to:

• Stale referenceKey and value values
• Broken references in cross-application copies

Solution
Key changes:

1. Removed duplicate selection check that prevented updates
2. Now always triggers onReferencedKeyChange on selection
3. Ensures referenceKey and value stay synchronized