Set Project Properties/preferences

[DPMiddleton]

The user should be able to change "global" preferences/properties per EA project.

At present, certain properties can only be set per diagram. If one has to change all diagrams in a project to e.g. a common style, one has to change the properties per diagram, one at a time.

It should be possible to change certain properties e.g. per project, similar to the "properties" context menu in a workspace :
- general
- diagram
- features
- connectors


Moreover, it should be possible to 'override' the project properties per diagram.