* Remove all mentions of Piwik
* Kill off all consumer of the old Piwik Analytics module
* Simplify ModalManager interface
* i18n
* Attempt to fix old e2e tests
* Remove unused component
* Iterate PR
* Add matrix-analytics-events as a dependency
* Make IEvent look like a stub definition
* Update pageview tracking to track screens, using a hypothetical definition of a screen event
* Remove distinction between pseudo and anon tracking, will need to rework it considering stubs