Some pages with AJAX should update quickly, because the data is likely
to be changing quickly, and be finished changing sooner. Other pages we
want to have tick over a bit slower.
This commit adds an optional ‘interval’ parameter to the updateContent
modules, which sets how often the page should ping the server for an
update.
It then sets the interval for the dashboard page to be 10 seconds,
rather than the default 1.5 seconds.
This commit adds two new sections to the dashboard
1. A banner telling you about trial mode, including a count of how many messages
you have left today, which is a restriction of trial mode
2. Panels with counts of how many emails and text messages have been sent in a
day, plus the failure rates for each
It does **not**:
- link through to any further information about what trial mode is (coming
later)
- link through to pages for the failure rates (coming later)
- change the ‘recent jobs’ section to ‘recent notifications’
