Amend bea7ef04e (find's auto-wrap by default)

Amend bea7ef04e (find's auto-wrap by default)

The default in the .ui is not considered in
GuiSearchWidget::restoreSession(), which sets a hard-coded default
if the stored setting is not found in the session file.

I'll start an ML discussion for whether the code in restoreSession()
should use the ui's default if the setting is not found in the
session.