panels: enforced setting an object name by using a mandatory constructor parameter

app/panel/node/node.cpp

@@ -23,11 +23,8 @@
 OLIVE_NAMESPACE_ENTER
 
 NodePanel::NodePanel(QWidget *parent) :
-  PanelWidget(parent)
+  PanelWidget(QStringLiteral("NodePanel"), parent)
 {
-  // FIXME: This won't work if there's ever more than one of this panel
-  setObjectName("NodePanel");
-
   // Create NodeView widget
   node_view_ = new NodeView(this);