update Page#display_sidebar? to always be true, unless it's a feature page without any published children
Merge pull request #617 from sul-dlss/sidebar-default

Make display_sidebar true by default for pages.
Update title of default browse category
Change Cancel button styling to btn-link style
Merge pull request #638 from sul-dlss/default-browse-category

Update title of default browse category
Merge pull request #641 from sul-dlss/cancel-btn-link

Change Cancel button styling to btn-link style
Turn search type ahead into a jQuery plugin.
Add sortable preview to the multi-up item grid style and item+text widgets.
Give multi-up and item+text autocomplete and inputs/panels more space w/i the left column.