ensure that the existing inspector is shown

example/sACN Explorer/multiverseview.cpp

@@ -215,7 +215,7 @@ void MultiverseView::createEditor(const QModelIndex &index)
       auto univ = data.value<QSacnUniverse*>();
       foreach (const auto & inspector, mInspectors)
         if (inspector->universe() == univ)
-          return;
+          return inspector->show();
       auto view = new UniverseView(this, univ);
       mInspectors.insert(view);
       connect(view, &QObject::destroyed, this, [this, view](){mInspectors.remove(view);});