Make History working

[Jeremi360]

History was working, but I lost a part of my changes and now it doesn't work. But fortunately I remember how it was implemented:

• [ ] add new _history var as Rakugo var
• [ ] on say signal add it content to _history
• [ ] on ask signal add it content with answer to _history
• [ ] on menu signal add it content with choice to _history
• [ ] make say content display by HistoryItem
• [ ] make ask content and answer display by HistoryItem
• [ ] make menu content and choice display by HistoryItem
• [ ] display all items from _history in History tab.