"Download object" contents not populated most of the time

[richlv]

1. Download a way
2. Select this way, search for "child selected"
3. Copy the found nodes
4. File -> Download object

Rarely, the nodes are populated in the download field. Most often, nothing is populated.
This is a problem, as just pasting it in the "Object ID" field gets a format like "node 1431642962
node 1431646044
node ", newlines not displayed - and this format is not considered valid.

This _might_ be related to the number of the nodes in the way (and clipboard) - it might be failing for longer ways.

That is, exactly where this functionality would be the most useful.
Usecase: deleting a pretty long and windy way, so that lots and lots of data around it is not downloaded.

Cannot add status output, as it does not pass the "external link" check.