qt: support Qt 5.5's class movements

QtDeclarative seems to be dissolving.

CMake/ParaViewQt5.cmake

@@ -30,6 +30,11 @@ IF( NOT Qt5_FIND_COMPONENTS )
     Widgets
     Xml
     )
+
+  if (NOT Qt5Core_VERSION_STRING VERSION_LESS "5.5.0")
+    list(APPEND Qt5_FIND_COMPONENTS
+      UiPlugin)
+  endif ()
 ENDIF()
 
 IF( Qt5Core_FOUND )

Qt/Core/CMakeLists.txt

@@ -333,6 +333,7 @@ if (PARAVIEW_QT_VERSION VERSION_GREATER "4")
   set (${vtk-module}_INCLUDE_DIRS
     ${Qt5Widgets_INCLUDE_DIRS}
     ${Qt5UiTools_INCLUDE_DIRS}
+    ${Qt5UiPlugin_INCLUDE_DIRS}
     ${Qt5Xml_INCLUDE_DIRS})
 else ()
   # import Qt4 build settings

Qt/Core/pqFormBuilder.cxx

@@ -33,7 +33,11 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "pqFormBuilder.h"
 
 #include <QtDesigner/QDesignerCustomWidgetInterface>
+#if QT_VERSION >= 0x050500
+#include <QtUiPlugin/QDesignerCustomWidgetCollectionInterface>
+#else
 #include <QtDesigner/QDesignerCustomWidgetCollectionInterface>
+#endif
 #include <QPluginLoader>
 #include <QCoreApplication>
 #include <QWidget>