* Specify type before parameter name
Various JSDoc `@param` entries were specified as `name {type}` rather
than `{type} name`.
A couple of `@return` entries have been given types as well.
* Use JSDoc optional syntax rather than Closure syntax
* Use @returns rather than @return
* Use consistent built-in type capitalization
Primitive types are lower-case, and Object is upper-case.
* Separate param/return description with a dash
* Adds ab test controller with a fullScreenVsPopup test
* Add migration for fullScreenVsPopup state
* Move abtest state under an 'abtests' object.
* MetaMask shows fullScreen group of a/b test unapproved txs in a full browser tab
* Ensure cancel metrics event in confirm-transaction-base.component.js is sent in all cases
* Switch to existing tab for unapproved tx if it exists when opening in full screen
* Send metrics event for entering a/b test from confirm screen
* Fix lint, unit and integration tests related to a/b test code
* Remove unnecessary tabs.query call in triggerUiInNewTab
