void SetupToolbar()
{
addAction.Activated += (sender, e) => {
using (var dialog = new ExpandedAssetDialog())
dialog.Run();
};
}
void RowDoubleClicked(object sender, RowActivatedArgs e)
{
if (e.Path.Indices.Length == 1)
{
var clickedAsset = Assets.GetNode(e.Path) as AssetTreeNode;
using (var dlg = new ExpandedAssetDialog(clickedAsset.Asset))
dlg.Run();
}
}