Do not display meal in the inactive part of a calendar

[opi]

Fixed with opi@6599c22, but need to wait for https://github.com/gordon-/atable/pull/10 to be merge before creating a pull request.

[vegaelle]

I saw this issue (this behavious was not intended), but since then, it seems to be a good idea to me to stay like this: we don’t need to print another month if the interesting day is in the previous. What do you think of that?

[opi]

PR here : https://github.com/gordon-/atable/pull/12

[opi]

Don't know if it's a good behaviour or not. The meal looks duplicated, but if we change its style maybe it could help when session are between 2 or more months.

[vegaelle]

Okay, definitely a bug, because I think that behaviour prevents the last meal to be shown.

Also, it has to be tested, but I don’t think that showing several meals in the same day is supported on the calendar.