Fixing Orphan showing as unconfirmed

* Fixes orphaned transactions showing as unconfirmed too
* Fixes transaction tables to show orphaned credits in green, not red

Fixes #490
Fix transaction table, adjust transaction class

* Ensure we also check newly added blocks for unconfirmed tx
* Only list orphaned transactions in the orphaned tab

Fixes #490
Merge pull request #495 from TheSerapher/issue-490

Issue 490