Improves file upload dragging to cancel more gracefully by dismissing the drop zone on dragend.
Fixes paginated preview on a content without a permalink to work.
Changes link dialog in $.rte to open on a dblclick so that single click allows text edit.
Allows backspace to delete a comment right before <del> or <ins> in RTE.
Adds anchor merge logic for when there are consecutive anchors with the same hrefs in RTE.
Adds manual unlock action in ContentTools.
Changes ToolPageContext#tryPublish to reset the publish date on new content if schedule date wasn't set.