Jan Mulder 2a58be6649 filter: fix trip header bug
With commit 5962f00679fae555, a well known problem was introduced.
Incorrect width setting for the spanning trip lines. And as there
is even a specific functon for that, just call this.

The reason the mentioned commit introduces this, is that
invalidate() causes layoutChanged signals, and invalidateFilter()
does not.

Signed-off-by: Jan Mulder <jlmulder@xs4all.nl>
2017-12-28 17:30:13 +01:00
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