Broken parsing and missing configuration of exchange pattern for ToDefiniton endpoint

If a user wants to specify the exchange pattern for an endpoint then he currently has to do that manually in the source code by specifying the

<to .... pattern="InOnly"/>

If the user then switches into design mode and back to source again, the pattern attribute is lost. That is a bug.

We also need a UI field for selecting the Exchange Pattern for an endpoint if its a ToDefinition Endpoint. This field should go into "Details" tab of the properties view.

Issue raised in:
https://www.youtube.com/watch?v=TBXWYFMF9PE