Set HTML page title such as "ECA - Create new model" so users can get back to that tab

Moving this over to the bpmn_io project since the route bpmn_io.add is defined there and requires the implementation of the title property. The title could be static, e.g. "Create new ECA model with BPMN.io". This could be added as bpmn_io.add.defaults._title

I've committed that to the dev release. Please test and review.

@mlncn would you mind a review and test of this fix, since you've reported the issue?

As we prepare for a new release of this module, I've now marked this as fixed and back ported it to 2.0.x

Automatically closed - issue fixed for 2 weeks with no activity.