Default view of graphs: display a longer timeframe (6+ months)

[philipp-sumo]

it would be an improvement if the default view of various graphs is spanning over a much longer period (6 months+) than the current 2 days. this would help getting more context on the current stability situation.

[wlach]

The way we're querying the database and returning data is not currently optimized for this kind of query, so this would require some changes for it to work well (i.e. not be terribly slow on both the client and the server). But I do agree that 2 days is ridiculously short for mission control's current use cases, we should probably show at least 7 by default, and maybe at least add "last 30 days" as an option.

[wlach]

We are now showing 14 day aggregates by default