Calendar widget : week start on monday

[Enthouane]

Currently, the calendar week starts on sunday, it would be great to have the choice to start it on monday.

[Ornanovitch]

The calendar doesn't seems to use localization at all while it's defined here

grist-widget/calendar/page.js

Line 22 in 6b2d934

function getLanguage() {

All the i18n folder is ignored. When document language is set to french, everything remains in english