Add ctkExpandableWidgetTest1

Fix ctkExpandButtonTest1 as some bad copy/paste was inserted.

Libs/Widgets/Testing/Cpp/CMakeLists.txt

@@ -231,7 +231,8 @@ SIMPLE_TEST( ctkDynamicSpacerTest2 )
 SIMPLE_TEST( ctkErrorLogWidgetTest1 )
 SIMPLE_TEST( ctkExampleUseOfWorkflowWidgetUsingDerivedSteps )
 SIMPLE_TEST( ctkExampleUseOfWorkflowWidgetUsingSignalsAndSlots )
-SIMPLE_TEST( ctkExpandButtonTestQSpinBox issue if used1 )
+SIMPLE_TEST( ctkExpandableWidgetTest1 )
+SIMPLE_TEST( ctkExpandButtonTest1 )
 SIMPLE_TEST( ctkFlatProxyModelTest )
 SIMPLE_TEST( ctkFileDialogTest1 )
 SIMPLE_TEST( ctkFittedTextBrowserTest1 )