ui: optimized widget signals for selecting clips/nodes

Decent performance optimization when working with the UI.

app/panel/table/table.cpp

@@ -25,17 +25,11 @@ OLIVE_NAMESPACE_ENTER
 NodeTablePanel::NodeTablePanel(QWidget* parent) :
   TimeBasedPanel(QStringLiteral("NodeTablePanel"), parent)
 {
-  view_ = new NodeTableWidget();
-  SetTimeBasedWidget(view_);
+  SetTimeBasedWidget(new NodeTableWidget());
 
   Retranslate();
 }
 
-void NodeTablePanel::SetNodes(const QList<Node *> &nodes)
-{
-  view_->SetNodes(nodes);
-}
-
 void NodeTablePanel::Retranslate()
 {
   SetTitle(tr("Table View"));