Issue title: folding a node at execution time close address listening
 Issue body: I though this was resolved but it is still possible to close/open address listening during execution by folding/unfolding node into the device explorer : 

![capture d ecran 2016-02-03 a 11 09 38](https://cloud.githubusercontent.com/assets/118426/12779241/33902850-ca67-11e5-9b02-160763f080cd.png)

this is a critical bug as it breaks all trigger interactions.
 Comments: 
 Comment 0: @jcelerier I have added a post in API to see if an address is closing/opening the listening.
by the way it seems there are some strange behaviors also into the API relative to listening activation but I would like to be sure the interface is not doing anything at execution time.
 Comment 1: okay, this will require a bit of time to do this properly. 
 Comment 2: Pushed in dev  to fix this, but please test many cases because it changed a lot of things.
 Comment 3: ok thx. I'll made some test later before to close this issue
 Comment 4: this is ok now !
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