Bugfix for powerange.js to prevent errors on iOS
Bugfix for powerange.js to prevent errors on iOS

roman1528/fhem-tablet-ui,knowthelist/fhem-tablet-ui,knowthelist/fhem-tablet-ui,roman1528/fhem-tablet-ui,knowthelist/fhem-tablet-ui,roman1528/fhem-tablet-ui,roman1528/fhem-tablet-ui,knowthelist/fhem-tablet-ui,knowthelist/fhem-tablet-ui