Given a string, select item in List Widget if it is found.
# PyQt
items = lw.findItems('text_to_search', QtCore.Qt.MatchExactly)
if items:
lw.setItemSelected(items[0], True)
# PySide
items = lw.findItems('text_to_search', QtCore.Qt.MatchExactly)
if items:
lw.setCurrentItem(items[0])