Reporting improvements

We've done a bit of refactoring of the reporting page to make it perform better, and have rolled out some new features/updates recently.

See the list below for the changes.

New features

Custom tracking fields are now available by ID, which will let you group across traffic sources by c1 -> c2 -> c3 and so on
The restrict data feature (the filter button in reporting) now lets you apply global filtering based on attributes, separate to what might be included in your report. This will let you filter all data to e.g. United States only, without needing to group by country in reporting first. These filters let you both include and exclude

Updates

The restrict data settings and inline filters are now included in your saved view config -- making saved views much more useful for your frequent reports
The "open in reporting" button from quick stats now applies global filters, so the reporting page loads the exact data expected
The funnel builder now uses better reporting queries for heatmaps, which should lead to less discrepancies
Improved the ROI highlighting styling in tables

Fixes

Fixed the styling of heatmap stats data to be more friendly
Fixed poor styling with hiding of the graph on the dashboard
Fixed a minor billing issue that was causing some user's usage overages not to sync (and therefore display correctly in the UI)