IntensityDataProjectionsWidget: cleanup in consctuctor

GUI/View/Projection/IntensityDataProjectionsWidget.cpp

@@ -33,23 +33,17 @@ IntensityDataProjectionsWidget::IntensityDataProjectionsWidget(QWidget* parent)
     , m_propertyPanel(new IntensityDataPropertyWidget(this))
     , m_selectionModel(nullptr)
 {
-    QHBoxLayout* mainLayout = new QHBoxLayout(this);
-    mainLayout->setSpacing(0);
-    mainLayout->setContentsMargins(0,0,0,0);
-
     auto* splitter = new QSplitter;
     splitter->setOrientation(Qt::Vertical);
     splitter->addWidget(m_projectionsCanvas);
     splitter->addWidget(m_projectionsWidget);
 
-    auto* centralWidget = new QWidget;
-    mainLayout->addWidget(centralWidget);
-
-    auto* hLayout = new QHBoxLayout(centralWidget);
-    hLayout->setContentsMargins(0, 0, 0, 0);
-    hLayout->setSpacing(0);
-    hLayout->addWidget(splitter);
-    hLayout->addWidget(m_propertyPanel);
+    auto* mainLayout = new QHBoxLayout(this);
+    mainLayout->setContentsMargins(0, 0, 0, 0);
+    mainLayout->setSpacing(0);
+    mainLayout->setContentsMargins(0,0,0,0);
+    mainLayout->addWidget(splitter);
+    mainLayout->addWidget(m_propertyPanel);
 
     m_toolbar->setOrientation(Qt::Vertical);
     m_toolbar->setStyleSheet("QToolBar{border-left:1px solid rgb(180,180,180);}");