Smart Suggester on Player: repeated suggestions

[AMChierici]

@ma5638 we need to fix this as soon as possible please. We need to keep a cache of the suggestions, and make sure we don't present the user a repeated suggestion. For example, I have asked 'what do your parents do' to my avatar, then I clicked on the "New" button on one of the cards with another suggestions, and it showed me again "what do your parents do".

We shall keep the cache in chronological order or as a stacked list: when the user loads, we push the suggestion to the bottom of the stack. If the user asks, we pop it out from the stack.