[BUGFIX] One func wizard installed shows "Select wizard" without selectbox

With one func wizard installed the text "Select wizard" is shown
without a selectbox. Hide the text if no func menu is available.

Resolves: #61452
Releases: 6.3
Change-Id: Iafb24bc2dcbf9b09b13939d7a8c5217ce94b43f0
Reviewed-on: http://review.typo3.org/32651
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>