Page.dialog: remove close function and isClosable prop use regular back button Fixes #6609 - widgets/page.dialog: Remove function close() and modify "Back" button to have data-rel="back"
defaults: Removing touchOverflowEnabled, which was deprecated in 1.1.
Demos: Dialog-styled pages: Started update.
Demos: Remove trailing whitespace and make sure there are no two sequential blank lines.
Revert "Demos: Remove trailing whitespace and make sure there are no two sequential blank lines."

This reverts commit 688b0acaf34c62405ceaed76bb3edf1c208f2ab7.
Theme: New active colors for default theme. Thanks @toddparker !
Theme: Changed swatch A font color and text shadow color.
Theme: A bit darker background color for bar A to improve contrast.