Don't use switch in core:invalidate-archive-data command, instead add new non-API method to Piwik Core.

Add initial command to invalidate report data w/ unit test (integration test coming in later commit).

Make ArchiveInvalidator an immutable service and add it to DI. markArchivesAsInvalidated (or whatever it's called) now returns an instance instead of an array of output messages.

number format in all websites

Improve number formats

https://github.com/piwik/piwik/pull/8857

Add metric documentation for nb_impressions, nb_interactions & interaction_rate.

 SEO widget: Number of DMOZ entries is zero

Launch archiving in UITestFixture so it is not launched by multiple requests in UI Tests.