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/gitlab/gitlaboptionspage.cpp

@@ -148,7 +148,7 @@ GitLabOptionsWidget::GitLabOptionsWidget(QWidget *parent)
     Grid {
         Form {
             defaultLabel, m_defaultGitLabServer, nl,
-            Row { Group { m_gitLabServerWidget, Space(1) } }, nl,
+            Row { Group { Column { m_gitLabServerWidget, Space(1) } } }, nl,
             m_curl, nl,
         }, Column { m_add, m_edit, m_remove, Stretch() },
     }.attachTo(this);