umbrello/umlwidgets/umlwidget.cpp : Proposed fix for bug 429181

- In functions mousePressEvent and mouseReleaseEvent, on calling
  m_scene->selectedCount() leave argument filterText at default value
  (false).  Reason: On distinguishing single vs multi selection all
  selected FloatingTexts shall be considered.
- In function mouseReleaseEvent handling of m_resized == true call
  deselect(event).

CCBUG: 429181