[j.corr] corr segfault caused by wrong placement of connect statement ()

Merging branch 'j.corr'  into 'main'.

See merge request !2068

GUI/View/Widget/GroupBoxes.cpp

@@ -77,12 +77,6 @@ CollapsibleGroupBox::CollapsibleGroupBox(const QString& title, QWidget* parent,
     m_toggleButton->setArrowType(Qt::ArrowType::DownArrow);
     m_toggleButton->setChecked(true);
     m_toggleButton->setSizePolicy(QSizePolicy::Minimum, QSizePolicy::MinimumExpanding);
-    connect(m_toggleButton, &QAbstractButton::clicked,
-            [tb = m_toggleButton, bo = m_body, &expanded](bool checked) {
-                tb->setArrowType(checked ? Qt::ArrowType::DownArrow : Qt::ArrowType::RightArrow);
-                bo->setVisible(checked);
-                expanded = checked;
-            });
 
     //... Body
 
@@ -90,6 +84,13 @@ CollapsibleGroupBox::CollapsibleGroupBox(const QString& title, QWidget* parent,
     layout->addWidget(m_body);
     m_body->setObjectName("ContentArea"); // stylesheet -> transparent background
     m_body->setVisible(expanded);
+
+    connect(m_toggleButton, &QAbstractButton::clicked,
+            [tb = m_toggleButton, bo = m_body, &expanded](bool checked) {
+                tb->setArrowType(checked ? Qt::ArrowType::DownArrow : Qt::ArrowType::RightArrow);
+                bo->setVisible(checked);
+                expanded = checked;
+            });
 }
 
 void CollapsibleGroupBox::setTitle(const QString& title)