Fixed crash at adding new page after conversion item as tool.

src/board/UBBoardController.cpp

@@ -2362,10 +2362,17 @@ void UBBoardController::togglePodcast(bool checked)
 void UBBoardController::moveGraphicsWidgetToControlView(UBGraphicsWidgetItem* graphicsWidget)
 {
     mActiveScene->setURStackEnable(false);
+    UBGraphicsItem *toolW3C = duplicateItem(dynamic_cast<UBItem *>(graphicsWidget));
+    UBGraphicsWidgetItem *copyedGraphicsWidget = NULL;
+
+    if (UBGraphicsWidgetItem::Type == toolW3C->type())
+        copyedGraphicsWidget = static_cast<UBGraphicsWidgetItem *>(toolW3C);
+
+    UBToolWidget *toolWidget = new UBToolWidget(copyedGraphicsWidget, mControlView);
+
     graphicsWidget->remove(false);
     mActiveScene->addItemToDeletion(graphicsWidget);
-    
-    UBToolWidget *toolWidget = new UBToolWidget(graphicsWidget, mControlView);
+
     mActiveScene->setURStackEnable(true);
 
     QPoint controlViewPos = mControlView->mapFromScene(graphicsWidget->sceneBoundingRect().center());

src/board/UBBoardView.cpp

@@ -866,6 +866,7 @@ void UBBoardView::mousePressEvent (QMouseEvent *event)
     mMouseDownPos = event->pos ();
 
     movingItem = scene()->itemAt(this->mapToScene(event->posF().toPoint()));
+
     if (!movingItem)
         emit clickOnBoard();
 
@@ -1099,6 +1100,11 @@ UBBoardView::mouseReleaseEvent (QMouseEvent *event)
   if (currentTool == UBStylusTool::Selector)
   {
       bool bReleaseIsNeed = true;
+      if (movingItem != determineItemToPress(scene()->itemAt(this->mapToScene(event->posF().toPoint()))))
+      {
+          movingItem = NULL;
+          bReleaseIsNeed = false;
+      }
       if (mWidgetMoved)
       {
           mWidgetMoved = false;