document: set decision on ekn-link-clicked
document: set decision on ekn-link-clicked

Returning true from the handler without explicitly
saying to  ignore it, will eventually make webview
load the requested uri.

When the uri belongs to a SetObjectModel the webview
it will simply break with a "Operation not supported"
message, instead of the proper article.

https://phabricator.endlessm.com/T18641

endlessm/eos-knowledge-lib,endlessm/eos-knowledge-lib,endlessm/eos-knowledge-lib,endlessm/eos-knowledge-lib