#5268: Calculate weight correctly.
#5268: Redo how the id is created.
#5268: Use user given title as default header text if available.
#5268: Reword option text.
#5268: Help text about empty widgets.
#5268: Render -> Appear
Merge pull request #6016 from openscholar/5268-accordion_widget

Accordion Widget bugfixes and clarification