Berthold Stoeger d0b3a06e03 Filter: use changed-signals to update filter
The dive-trip models now send changed-events if the shown-status
changed. Thus, there is no reason to fully reset the filter on
filter changes.

Simply tell the filter that it has to react to changes of SHOWN_ROLE.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
2019-12-04 13:00:23 +01:00
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