Function checkGroupButton

pj_app/src/MainWindow.cpp:146–154

// resync (e.g. binding the toolbar to a newly-focused plot) must not run the Curve
// Width/Style groups' click side effects — refreshing the open preview panels.
void checkGroupButton(QButtonGroup* group, int id) {
  if (group == nullptr) {
    return;
  }
  if (auto* btn = group->button(id)) {
    const QSignalBlocker blocker(group);
    btn->setChecked(true);
  }
}

constexpr auto kDefaultRegistryUrl =
    "https://raw.githubusercontent.com/PlotJuggler/pj-plugin-registry/"