Clear selection in directory list appropriately (#452)

The selection wasn't cleared when coming out of a top-level dir.

Author: tsujan

src/mainwindow.cpp

@@ -1375,11 +1375,14 @@ void MainWindow::chdir(const ArchiverItem *dir) {
  auto dirTreeModel = ui_->dirTreeView->model();
  if(dirTreeModel) {
  auto dirTreeIdx = indexFromItem(dirTreeModel->index(0, 0), currentDirItem_);
+ auto selModel = ui_->dirTreeView->selectionModel();
  if(dirTreeIdx.isValid()) {
- auto selModel = ui_->dirTreeView->selectionModel();
  selModel->select(dirTreeIdx, QItemSelectionModel::Select|QItemSelectionModel::Current);
  ui_->dirTreeView->scrollTo(dirTreeIdx);
  }
+ else {
+ selModel->clearSelection();
+ }
  }
 }