(node:25486) MaxListenersExceededWarning

I could notice several messages like this one during the unit tests:

(node:25486) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 end listeners added. Use emitter.setMaxListeners() to increase limit

I'm currently fixing it, there are several places where the listeners are not correctly removed once the concerned component is being closed.

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