Discard the flash at the end of the current action when rendering js.

This prevents success / error messages from appearing on the next request.

@amansinghb small and subtle. thanks
Add page parameter to language link
Merge branch 'bug/welsh-page-number'
Assign attributes explicitly
Delegate '<<' to items collection
Remove item writer
Remove unused query parameter from SearchResultCollection
Make SearchResultCollection an Enumerable
Merge branch 'consistent-collections'
Add conditional rb for when to show the skip-to-main-navigation link
Merge branch 'skip-to-main-nav-link'
Add canonical meta tag to news index
Add alternate meta tags to news index
Merge branch 'bug/metatags'
Update links to display an icon if not on the MAS website