SVY-6906 eclipse selection update

output svy-id special for the designer
SVY-6906 eclipse selection update

moved the node selection based on size the the decorators. Mouse
selection really selects the element that has the svy-id as an attribute
SVY-6906 eclipse selection update

use parentNode instead of element because IE doesn't always return if it
is not an element.
SVY-6906 eclipse selection update

remove endpoint type from the session key, just use the session uuid
(should be already uniek)
SVY-6906 eclipse selection update

the editor area now has also a websocket talking to eclipse, pushing the
selection
SVY-6906 eclipse selection update

refactor Editor_endpoint -> design_endpoint