Always show 3D widgets even if Qt controls are hidden.
Use SMTK setting to always show 3D widgets unless the user toggles them off - base class overrides ParaView behavior that hides widgets when their Qt controls are not focused or hidden.
Fix typo for qtReferenceTree in Duplicate.sbt
Install icon svg headers so they can be used by aeva-session client.
Depends on cmb/smtk!2691 (merged)