Method undo_with_checks

src/World.cpp:261–264

}

void World::undo_with_checks() {
    if(!clientStillConnecting && !drawProg.prevent_undo_or_redo())
        undo.undo();
}

void World::redo_with_checks() {
    if(!clientStillConnecting && !drawProg.prevent_undo_or_redo())