CalendarItemEditor - after patient adding, search field is not cleared

[GoogleCodeExporter]

* add a new calendar item with a double click, the editor dialog opens.
enter the patient search line edit and enter a char. the popup opens, select a 
patient, the patient gets added.

In the code (in calendaritemeditorpatientmapper.cpp, 
CalendarItemEditorPatientMapperWidget::onPatientSelected() )
there is the lineEdit cleared afterwords with 
ui->patientSearchEdit->clear();

This code is executed (tested with debugging), and calls directly the 
QLineEdit->clear() function. But The displayed text does not vanish.

Original issue reported on code.google.com by christian.a.reiter@gmail.com on 19 Oct 2012 at 10:34