Dead icon links to http://dev.openseamap.org/

[Klumbumbus]

see OpenSeaMap/josm#25, OpenSeaMap/online_chart#105 and https://josm.openstreetmap.de/ticket/17670

[malcolmh]

I have made copies of the missing icons in this repo and changed the references in both Presets_Hafen.xml & INT-1-preset.xml

[Klumbumbus]

Thanks.