re-filter PeopleProxy on selected account change

Since the filterAcceptsRow filtering depends on the account
selection we should automatically re-filter when it changes; the
clients shouldn't be responsible for this.

Change-Id: I94dce4eaa5fe77aec1cfa4efa5a6fbc75dce7584

src/recentmodel.cpp

@@ -1140,6 +1140,11 @@ RecentModel::peopleProxy() const
 PeopleProxy::PeopleProxy(RecentModel* sourceModel)
 {
     setSourceModel(sourceModel);
+
+    /* since the filterAcceptsRow depends on the selected account, we need to re-run the filtering
+     * when the selected account changes automatically */
+    connect( AvailableAccountModel::instance().selectionModel(),
+        &QItemSelectionModel::currentChanged, [this]() {this->invalidateFilter();});
 }
 
 bool