inter-neighbourg edges are not filtered

[damscal]

I am not completely sure if this is a bug or if it is just me failing to fully understand how to configure tiddlymap.

Steps to reproduce:

1. create tiddler A
2. create tiddler B
3. create tiddler C
4. inside tiddler B create a tiddlywiki link to tiddler C
5. create edge connections from tiddler A to tiddler B, and from tiddler B to tiddler C
6. create a tiddlymap view with this edge filter: -[prefix[_]] -[[tw-body:link]] -[[tw-list:tags]] -[[tw-list:list]]
7. add tiddler A as a node in the view
8. in the neighbourhood scope select 2 steps or more
9. check the inter-neighbourg edges flag

Result: the links to edge from tiddler B to tiddler C is displayed, even though it should be filtered out by the view configuration

This has been tested both in my wikis and in the tiddlymap demo site

Also: when I check the "Filter nodes by edge types:" flag in the Layout tab of the view configuration, I always get a completely blank view. When I test this in the demo site, it works correctly