fix #1354: Overlay on section not properly disposed when refresing parent section

(cherry picked from commit 3ba9be0064d0497a5b32ebe8abb404e329b0fb18)

Conflicts:
	src/aria/templates/Section.js
	src/aria/templates/SectionWrapper.js
	src/aria/templates/TemplateCtxt.js
	src/aria/utils/DomOverlay.js
	src/aria/utils/overlay/LoadingOverlay.js
1.4.17O