Eliminated ability to edit locked survey by editing the survey title.

	app/views/surveyforms/_survey_section_fields.html.erb: added survey_locked check at the top and bottom
	of sections.

	lib/assets/stylesheets/surveyor_gui.sass: changed formatting of survey section button bar to remove
	absolute positioning.  Not really necessary, but considered and then decided not to allow changes to
	survey title, which would have needed this change.