WIP summary grid support
Add purge and truncate mass actions to summary grid
Merge branch 'develop' into feature/summary-grid

* develop:
  Add option to ignore strings in the admin
Add menu and ACL for summary
Strings collection improvements
Add single locale purge and truncate options
Add buttons to switch between report and summary
Merge branch 'feature/summary-grid' into develop

* feature/summary-grid:
  Add buttons to switch between report and summary
  Add single locale purge and truncate options
  Strings collection improvements
  Add menu and ACL for summary
  Add purge and truncate mass actions to summary grid
  WIP summary grid support