SideNav:Third Level Menu Items Parents Are Links

Build 5 on 382-button-link-type-button-icon-alignment-problem-2
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Baseline History
Build 58710a28
Current build. There are unaccepted changes, so build 3 is still the baseline.
Build 34314fe7 current baseline
Accepted by Airike Jaska.
Build 14314fe7
Auto-accepted