from UMLScene to the owning widget)

umbrello/widgets/umlwidget.{h,cpp}
- New virtual function widgetWithID() returns 'this' if given id matches
  either of m_nLocalID, m_umlObject->id(), or m_nId; else returns NULL.
  The intention is that child classes of UMLWidget may reimplement this
  function in order to test the id against their child widgets.

umbrello/widgets/portwidget.{h,cpp}
- Reimplement UMLWidget function widgetWithID() to additionally check
  m_pName.
- In function slotMenuSelection() case ListPopupMenu::mt_NameAsTooltip,
  - If m_pName is non NULL then do not call m_scene->removeWidget(m_pName).
    Reason: m_pName is now entirely managed by PortWidget.
  - If m_pName is NULL then after assigning a new FloatingTextWidget to
    m_pName call m_pName->setParentItem(this).
    This completes the switchover of m_pName management from UMLScene.
    Further, this means that m_pName position is no longer relative to
    UMLScene but instead is now relative to its owning PortWidget.
    Adjust m_pName X/Y computations accordingly.
- In function setFloatingTextWidget(), m_pName->setParentItem(this) if
  m_pName is non NULL.
- In function loadFromXMI(),
  - Remove loading of attribute "textid";
  - If m_pName->loadFromXMI() returns with success then call
    m_pName->setParentItem(this).
- In function saveToXMI(), remove saving of attribute "textid".

umbrello/umlscene.{h,cpp}
- In function widgetOnDiagram(),
  - in foreach loop over m_WidgetList, call obj->widgetWithID(id) instead
    of direct comparison (id == obj->id())
  - in foreach loop over m_MessageList, add TODO note about checking whether
    MessageWidget should reimplement widgetWithID()
- In function findWidget(),
  - in foreach loop over m_WidgetList, replace special casing of wt_Object
    and direct comparison (id == obj->id()) by call to obj->widgetWithID(id)
  - in foreach loop over m_MessageList, add TODO note about checking whether
    MessageWidget should reimplement widgetWithID()
- Remove function findWidgetByLocalId(); due to above change it is redundant
  to findWidget().

umbrello/cmds/widget/cmd_baseWidgetCommand.cpp
umbrello/cmds/widget/cmd_createWidget.cpp
umbrello/cmds/widget/cmd_removeWidget.cpp
- In function redo() call umlScene->findWidget() in lieu of
  umlScene->findWidgetByLocalId() which was removed.

umbrello/widgets/floatingtextwidget.{h,cpp}
- Reimplement UMLWidget function onWidget() to additionally check PortWidget
  parentage.
- In function setText(), avoid calling m_linkWidget->seqNumAndOp() when
  m_linkWidget is NULL.
- In function loadFromXMI(), call setText() instead of directly assigning
  m_Text in order to achieve geometry update. (To be checked.)
- Fix spelling at bool usefulWidget.
- In function saveToXMI(), return immediately if isEmpty() returns true.

umbrello/widgets/pinwidget.cpp
- In function loadFromXMI(), add TODO note about removing the code for
  loading "textid".

umbrello/version.h
- Increment XMI_FILE_VERSION due to changes in function saveToXMI() of
  FloatingTextWidget and PortWidget.