fix labels collapse at conn tree

[Philip-Carneiro-KX]

Changes introduced by this PR

• Fix Error: Labels are collapsable without any connection under it

Now the labels without any connection under it are not expandable/collapsable

[kx-sonarqube[bot]]

Quality Gate passed

Kudos, no new issues were introduced!

0 New issues
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

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