Fixes #3116 If website is ecommerce, do not limit custom variables reports to 1,000 rows. Limit to 50,000 instead.

fixes #4843 send email notifications to all super users in case of new Piwik core update and/or Marketplace plugin updates. Core update email notifications are enabled by default and can be disabled in config. Plugin update notifications are disabled by default and can be enabled in UI -> General settings

Fixes #4768 Implement performance improvement for period=range: do not archive sub-tables (only the parent table).
The sub-tables will be archived only when idSubtable is found, or flat=1, or expanded=1

@diosmosis first win for password reset workflow test
Failed screenshot: http://builds-artifacts.piwik.org/ui-tests.master/1910.1/processed-ui-screenshots/Login_password_reset.png

This will fix the Custom Alerts missing From header.