Reduce vertical minimum size of Qt versions settings.

The main point of the change is to hide the version info while the
details for the helpers are shown.

Change-Id: I02166674d2339a585fda0eebe643289471ca139c
Reviewed-on: http://codereview.qt-project.org/5325
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Daniel Teske <daniel.teske@nokia.com>

src/libs/utils/detailswidget.cpp

@@ -331,6 +331,7 @@ void DetailsWidget::setState(State state)
         return;
     d->m_state = state;
     d->updateControls();
+    emit expanded(d->m_state == Expanded);
 }
 
 void DetailsWidget::setExpanded(bool expanded)