private void button_entity_mark_subtype_Click(object sender, EventArgs e)
{
Editor editor = ActiveDocument;
Level level = editor.m_level;
if (level.selected_entity > -1 && level.entity[level.selected_entity].alive)
{
editor.SaveStateForUndo("Mark entities of same subtype");
level.MarkEntitiesOfSubtype(level.entity[level.selected_entity].Type, level.entity[level.selected_entity].SubType);
editor.RefreshGeometry();
}
}
