Brews per day plot should show all days

[reox]

Today I noticed, that the "brews per day" plot only makes sense, if you have at least a brew every day. For example, I had no brews recorded for a week (see the gap between 5th and 14th) but the plot does not show me any days with zero brews: results in

I think ideally, the plot should really have days on the x-axis and thus also show zero for days without a brew. Right now it seems to just select the last 31 days where a brew was recorded.

[graphefruit]

Hey @reox, thanks for the ticket. I'll have a look for the next version here. I will not address this in 6.2