Move PageWidgets definition earlier in Elements/Tabs

By defining them at the end, nothing could change them when you click
into a different part of the UI.  Articles used to provide a default
search under /Articles/ and this allows that to work again.
Update GotoArticle to act more like GotoTicket

This removes the button and hints in the box what to search for instead.
Add GotoArticle and remove the Ticket page widgets when in /Articles

This means you can't trivially create a ticket when working on Articles,
but having two search boxes and moving the two normal search boxes
around felt even more confusing.
Removing CreateTicket/SimpleSearch renumbered forms

The article tests are made of form_number and want to start using
form_name, but I didn't want to tackle it all on this branch.
Merge branch '4.0/restore-article-quicksearch' into 4.0-trunk