Mobile: modify filter so that all models get notified

When we change the filter string, we need to make sure that the collapsed model is
also aware of the change.

Similarly, instead of just calling resetFilter and directly changing the core
data structures, we need to set the filter to the empty string which ensures
that all three models get notified and the view updates correctly.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

mobile-widgets/qml/DiveList.qml

@@ -557,7 +557,7 @@ Kirigami.ScrollablePage {
 		text: qsTr("Filter dives")
 		onTriggered: {
 			rootItem.filterToggle = !rootItem.filterToggle
-			diveModel.resetFilter()
+			manager.setFilter("")
 			numShownText = diveModel.shown()
 		}
 	}

mobile-widgets/qmlmanager.cpp

@@ -2090,6 +2090,7 @@ void QMLManager::setFilter(const QString filterText)
 	QtConcurrent::run(QThreadPool::globalInstance(),
 			  [=]{
 				DiveListSortModel::instance()->setFilter(filterText);
+				CollapsedDiveListSortModel::instance()->updateFilterState();
 				QMetaObject::invokeMethod(qmlWindow, "hideBusyAndConnectModel");
 			  });
 }