Consolidates content type selection dropdown markup logic.
Refines site map widget styles a little bit.
Tweaks how ToolPageContext.typeSelect works to require passing selected item and to always group.
Adds item type filter to recent activity widget.
Fixes error details showing up in production (security issue).
Fixes preview to only trigger the AJAX call to get the new content when it's visible.
Fixes field preview lingering when it's on and you close the pinned preview.