Utils: Make Layouting::Group { .. } less weird

It had a implicit vertical layout leading to unneded layout nesting
in quite a few cases. The price is an added Column { ... } in those
places where the implicit vertical layout was sufficient before.

Change-Id: I3ae1f03f9c1d691bd0c563b0447edd03ee02bbd2
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/coreplugin/systemsettings.cpp

@@ -207,7 +207,12 @@ public:
         form.addRow(Span(3, Row{m_clearCrashReportsButton, m_crashReportsSizeText, Stretch()}));
 #endif
 
-        Column{Group{Title(tr("System")), form, Stretch()}}.attachTo(this);
+        Column {
+            Group {
+                Title(tr("System")),
+                Column { form, Stretch() }
+            }
+        }.attachTo(this);
 
         m_reloadBehavior->setCurrentIndex(EditorManager::reloadSetting());
         if (HostOsInfo::isAnyUnixHost()) {