[Denemo-devel] Menu system tidy up.

[Richard Shann]

As we are getting closer to the point where people might start
contributing scripts it seemed a good idea to tidy the menu system up,
especially with view to future developments.
The most visible change is dropping the Action Menu. The idea sounded
good - organizing by Action, but the hierarchy becomes an object
hierarchy after the top level (because we don't really have special
sorts of Insert or Delete or what have you), so it does not really serve
a good purpose.
In addition I have introduced a logical order to the main object menu,
starting from the grossest level on the left down to the smaller levels
further on, ending with the meta objects such as bookmarks and cursor.
Although this means that the most important thing, Notes, are no longer
in the first menu I think it is much better to arrange the menus in a
logical order. This is because they are mainly for looking things up.
Likewise, Tuplets and grace notes are now under notes & so on.
This does entail a bit more revision of the documents but as far as code
goes I think this should be it for the release.

Richard