* 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
* Use selector for state.metamask.accounts in all cases.
* Default to cached balance when selecting metamask accounts
* Adds the cached-balances controller
* Documentation and small codes fixes for #5843
Co-Authored-By: danjm <danjm.com@gmail.com>
