Add Rumantsch Grischun to Print dialog control

[chicoff]

I, @Viglino, if you like, we have translated the print dialog control into Romansh (rm).

title: 'Stampar', orientation: 'Orientaziun', portrait: 'Vertical', landscape: 'Horizontal', size: 'Format', custom: 'Grondezza dal monitur', margin: 'Margin', scale: 'Stgala', legend: 'Legenda', north: 'Fritga nord', mapTitle: 'Titel', saveas: 'Memorisar sco...', saveLegend: 'Memorisar legenda...', copied: '\u2714 Copià en las notizias', errorMsg: 'Betg memorisar la carta', printBt: 'Stampar', clipboardFormat: 'Copia en las notizias...', jpegFormat: 'Memorisar sco jpeg', pngFormat: 'Memorisar sco png', pdfFormat: 'Memorisar sco pdf', none: 'betg', small: 'pitschen', large: 'grond', cancel: 'Stizzar'

[Viglino]

Should work now: https://viglino.github.io/ol-ext/examples/canvas/map.control.printdialog.fr.html?lang=rm

[chicoff]

Perfect! Thank you