- Fixed bug #1185054: https://bugs.launchpad.net/bitbudget/+bug/1185054
- Set the 'Historic' comboboxes to show a date range for the last 3 months which is more useful than the current behaviour of having them both at the current time.
- Smoother switching between hourly/daily/monthly charts. They now default to a sensible 24h/30d/12M duration respectively. This eliminates the problem of hanging due to switching from a large duration with low (e.g. monthly) precision to a high (e.g. hourly) precision.