Incomplete multipolygons in Overpass API download

[tordanik]

When downloading OSM data from Overpass API using the "Download OSM data" action in OSM2World's desktop frontend, members outside the bounding box appear to be missing from multipolygon relations.

This has been observed to result in missing water bodies with the Baltimore example from #217 with the following bounds:

• minlat: 39.2011000
• minlon: -76.5676000
• maxlat: 39.2463000
• maxlon: -76.4933000

The Overpass API query constructed for this example in OverpassReader looks like this:

[bbox:39.2011,-76.5676,39.2463,-76.4933];(node;rel(bn)->.x;way;node(w)->.x;rel(bw););out meta;