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/nim/settings/nimsettings.cpp

@@ -143,7 +143,7 @@ NimToolsSettingsPage::NimToolsSettingsPage(NimSettings *settings)
         Column {
             Group {
                 Title("Nimsuggest"),
-                settings->nimSuggestPath
+                Column { settings->nimSuggestPath }
             },
             Stretch()
         }.attachTo(widget);