#204 Set start date (distance to today) at charts

[Magyn]

I want to be able to set the distance from the current day backward to the start day at the charts.

Because usually i want to see my charts only 2 month backwards and it's troublesome to do that for every(!) chart by hand every day, when I watch to them.

Of course this setting should be able to put on or off.

I may make sense, to be able to set die distance for every chart itself.