[e4-dev] Proposed 'breaking' model changes

[Eric Moffatt <emoffatt@xxxxxxxxxx>]

Remy has found some issues withthe current
model when trying to implement the compatibility layer's 'saveable' views/editors.
Essentially he can't determine up front whether to create a regular MPart
or an MSaveablePart..

Also, given that all parts have a 'persistedState'
attribute there seems to be no need for MEditor, it can store whatever
info it needs to recreate its input there.

Given this I expect that next week I'll
be removing both MSaveablePart and MEditor and moving the 'dirty' flag
directly into MPart.

Also, since we're taking the hit anyways
I'm also going to (finally!) change the MElementContainer's 'activeChild'
to 'selectedElement'.

Let me know if you think that this is
going to cause problems, I'll update the models for the contacts and photo
demos but I realize that there are likely a few others out there now.

Eric