bulk import helper

[rweait]

I've been working with large import files in josm and a couple of things would be nice as a bulk import helper:

• a count of changes in the current changeset, without having to attempt an upload and failing.

• an option to upload only the selected node/way/relation. When the import file has 66,000 changes, uploading a dozen of the largest individually can make the rest an easy and legal upload.

• a count of the number of overlength ways and a quick way to select the longest (and fix it)

• a way to split a layer into sensible, legal changeset-sized layers. Perhaps I can divide the import file into quadrants (without breaking ways / relations) and upload each quadrant in turn?

• a way to compare an import layer to the existing database and mark import items as upload, do not upload, upload immediately, and have then hide. So un-triaged items in the import layer are obvious.

[Gubaer]

• an option to upload only the selected node/way/relation. When the import file has 66,000 changes, uploading a dozen of the largest individually can make the rest an easy and legal upload.

You may try to

• create a new empty layer
• select nodes/ways/relations
• merge the selected primitives to an empty layer with Edit -> Merge selection
• activate the new layer
• upload the new layer

[Gubaer]

(In [2599]) fixed #4130: Chunked upload mode counter is wrong
fixed #4118: Upload dialog too complicated
fixed #4129: Hide the new "Upload data in one request/chunks/individually" behind an expanding "Upload method" box
fixed #2075: API 0.6: don't upload more than 50K edits at once
fixed #4044: Huge uploads never end [should be solved with chunked upload mode]
fixed #4110: Upload dialog spacing wrong
fixed #3386: Upload dialog has empty areas when the changeset doesn't include all of add/modify/delete operations
see #3369: bulk import helper [JOSM now supports multi changesets uploads]

See online help for more details.

Completes r2598