noosfero | Add option to clone an article (#579)

[Fábio Teixeira]

New comment for Merge Request 579

https://gitlab.com/noosfero/noosfero/merge_requests/579#note_1259273


Fábio Teixeira

@diguliu  we tried to pass the clone to all the hepers where it were needed, but we had to rename the EventsHelper to the singular and it make a lot of thing start to break through noosfero. 
Then we tried to fix what was broken, but in the end we figured that it was too much overhead to some thing so simple.
So please take a look on the littler change we made.

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