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/cmakeprojectmanager/cmakebuildconfiguration.cpp

@@ -347,12 +347,14 @@ CMakeBuildSettingsWidget::CMakeBuildSettingsWidget(CMakeBuildSystem *bs) :
         Column {
             m_configurationStates,
             Group {
-                cmakeConfiguration,
-                Row {
-                    bc->aspect<InitialCMakeArgumentsAspect>(),
-                    bc->aspect<AdditionalCMakeOptionsAspect>()
-                },
-                m_reconfigureButton,
+                Column {
+                    cmakeConfiguration,
+                    Row {
+                        bc->aspect<InitialCMakeArgumentsAspect>(),
+                        bc->aspect<AdditionalCMakeOptionsAspect>()
+                    },
+                    m_reconfigureButton,
+                }
             }
         }.setSpacing(0)
     }.attachTo(details, false);

src/plugins/cmakeprojectmanager/cmakespecificsettings.cpp

@@ -97,7 +97,7 @@ CMakeSpecificSettingsPage::CMakeSpecificSettingsPage(CMakeSpecificSettings *sett
         Column {
             Group {
                 Title(::CMakeProjectManager::Internal::CMakeSpecificSettings::tr("Adding Files")),
-                s.afterAddFileSetting
+                Column { s.afterAddFileSetting }
             },
             s.packageManagerAutoSetup,
             s.askBeforeReConfigureInitialParams,