Proper ISMINE_WITNESS behaviour #198
Description
When we have only the witness key for a witness address and not the spending key, the codebase should behave differently.
The first part of this is already handled the various 'ismine' functions return ISMINE_WITNESS; however presently the rest of the codebase doesn't know how to deal with this and treats it as ISMINE_SPEND (aside from various UI components that treat things differntly at an account level, and a few RPC commands that know better.)
The rest of the codebase should be fixed to handle this correctly.
See: 3c1381b