Run configuration: Fix layout of debugging options

The differences in QFormLayout lead to unexpected results on macOS.

Change-Id: If2b55a6233af3f8ac1afa6e3c586a16a263b32b5
Reviewed-by: Christian Stenger <christian.stenger@qt.io>
Reviewed-by: hjk <hjk@qt.io>

src/plugins/debugger/debuggerrunconfigurationaspect.cpp

@@ -104,6 +104,7 @@ void DebuggerLanguageAspect::addToLayout(LayoutBuilder &builder)
         m_value = m_checkBox->isChecked() ? EnabledLanguage : DisabledLanguage;
         emit changed();
     });
+    builder.addItem(QString());
     builder.addItem(m_checkBox.data());
 
     if (!m_infoLabelText.isEmpty()) {