3235: Replace link with search widget in top nav.
3235: Merge branch 'master' into 3235-top-nav-site-search
3235: Do not bring up search dialog until enter/click in top nav
widget. Add special case "feeling lucky" behavior when the search
string is an Arvados UUID.
3235: Don't blow up when calling 404 from ActionsController.

Before:

  At .../app/views/application/404.html.erb:17
  #<ActionController::UrlGenerationError: No route matches {:action=>"index", :controller=>"actions"}>

After:

  Use the class_name deduced from the uuid to determine the most
  likely controller, instead of assuming the current controller is the
  right one.
3235: Fix missed filter update after paste event.
3235: Merge branch 'master' into 3235-top-nav-site-search
3235: Update results as soon as search modal opens.
3235: Make collections show up in search results.
3235: Show names of named collections instead of their uuids, but support searching by uuid.
3235: Accept group_class="folder" as a project.
3235: Enable "rename folder to project" migration.
3235: Fix empty collection migration: ensure anonymous_group exists in
the database before trying to create a permission link for it.
3235: Merge branch 'master' into 3235-top-nav-site-search
3235: Fix UrlGenerationError on 404 page.
3235: Show uuid without "unnamed -" prefix for nameless objects.
3235: Fix test
Merge branch '3235-top-nav-site-search' refs #3235