rem: W_ReparentView(view, v);
add: W_ReparentView(view, v, 0, 0);
context: WMSetFilePanelAccessoryView(WMFilePanel *panel, WMView *view){    WMView *v;    panel->accessoryView = view;    v = WMWidgetView(panel->win);    W_ReparentView(view, v);    W_MoveView(view, (v->size.width - v->size.width)/2, 300);}