change in topmenu and some fixes

src/framework/ui/uianchorlayout.cpp

@@ -84,6 +84,9 @@ void UIAnchorLayout::removeWidget(const UIWidgetPtr& widget)
 void UIAnchorLayout::updateWidget(const UIWidgetPtr& widget, UIAnchorGroup& anchorGroup)
 {
     UIWidgetPtr parentWidget = getParentWidget();
+    if(!parentWidget)
+        return;
+
     Rect newRect = widget->getRect();
     bool verticalMoved = false;
     bool horizontalMoved = false;

src/framework/ui/uihorizontallayout.cpp

@@ -38,6 +38,8 @@ void UIHorizontalLayout::applyStyle(const OTMLNodePtr& styleNode)
 void UIHorizontalLayout::internalUpdate()
 {
     UIWidgetPtr parentWidget = getParentWidget();
+    if(!parentWidget)
+        return;
     UIWidgetList widgets = parentWidget->getChildren();
 
     if(m_alignRight)

src/framework/ui/uiverticallayout.cpp

@@ -37,6 +37,9 @@ void UIVerticalLayout::applyStyle(const OTMLNodePtr& styleNode)
 void UIVerticalLayout::internalUpdate()
 {
     UIWidgetPtr parentWidget = getParentWidget();
+    if(!parentWidget)
+        return;
+
     UIWidgetList widgets = parentWidget->getChildren();
 
     if(m_alignBottom)

src/framework/ui/uiwidget.cpp

@@ -639,6 +639,9 @@ void UIWidget::setVisible(bool visible)
                 parent->focusPreviousChild(Fw::ActiveFocusReason);
         }
 
+        // visibility can change can change parent layout
+        updateParentLayout();
+
         updateState(Fw::ActiveState);
         updateState(Fw::HoverState);
     }