We were mixing up header links with wiki links and the alt text. It was
a bit messy. We currently do not support linking to a particular part of
a note. Nor do we support wiki links as link references.
Fixes APP-A0
A note has a parent which is the physical folder it is inside, and a
parent folder which it is being displayed inside. It's useful to have
the latter as that can be used to display the next note - in the case of
the Journal Editor, and open the graph view as well.
We now have a list of all the features that are implemented, and we can
use that to show a kind of feature list which can be used to -
1. Move away from app rental model
2. Showcase a feature list; see WorkingCopy
