WET theme: Cleaned up the indenting in a couple of the theme SCSS files
Merge pull request #3698 from pjackson28/cleanupthemescssindenting

WET theme: Cleaned up the indenting in a couple of the theme SCSS files
Table: Fixed table header sort icon display
Merge pull request #3699 from pjackson28/fixedtableheader

Table: Fixed table header sort icon display
Replaced occurrences of '++' with '+= 1'.
Merge pull request #3685 from thomasgohard/js-performance-improvements

Replaced occurrences of '++' with '+= 1'
Tables: Removed role='grid' from DataTable wrapper
Merge pull request #3701 from pjackson28/removerolegridtables

Tables: Removed role='grid' from DataTable wrapper
Auto-generate overlay close button.
Minor changes to the overlay header and close button CSS to handle overlays without titles.
Updated English working examples and added French working examples.
Merge pull request #3700 from thomasgohard/plugin-overlay

Improvements to overlay plugin
Toggle: ensure opened accordion is in view