Method retheme

pj_widgets/src/DateRangePicker.cpp:723–728

}

void DualCalendarWidget::retheme() {
  updateNavButtons();  // re-inks the chevrons via renderChevronIcon(pickerTokens().text)
  for (auto* cal : calendars_) {
    cal->update();
  }
}

void DualCalendarWidget::leftPrev() {
  advanceMonth(left_year_, left_month_, -1);