private void bWorldEdit_Click( object sender, EventArgs e )
{
AddWorldPopup popup = new AddWorldPopup( Worlds[dgvWorlds.SelectedRows[0].Index] );
if ( popup.ShowDialog() == DialogResult.OK ) {
string oldName = Worlds[dgvWorlds.SelectedRows[0].Index].Name;
Worlds[dgvWorlds.SelectedRows[0].Index] = popup.World;
HandleWorldRename( oldName, popup.World.Name );
}
}