+1
I often use coordinates shown on wikipedia pages with josm and would really enjoy a Coordinates input field above the Latitude input field where I could just paste the coordinates without having to manually split the lat/long values and paste them separately into the two input fields. The coordinate notation of Wikidata and the English wikipedia should be enough to work with - I do not expect other notations to work:
Wikidata: 28°18'53"N, 112°33'14"E (with comma)
English: 28°16′37″N 112°33′07″E (without comma)
German: 28° 15′ N, 112° 33′ O
French: 28° 15′ 19″ nord, 112° 33′ 29″ est
Chinese: 28°19′34″N 112°33′28″E (same as English)
