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Use QLineEdit's clear button feature in Active Qt.
Friedemann Kleint authored
Remove old filter widget.

Change-Id: I1ee7d8695d98044cc22e83fad81dd1f2b486b419
Reviewed-by: default avatarKevin Ottens <kevin.ottens@kdab.com>
Reviewed-by: default avatarMiikka Heikkinen <miikka.heikkinen@digia.com>
Reviewed-by: default avatarFriedemann Kleint <Friedemann.Kleint@digia.com>
b29d07c5