Brace up single line if's and foreach's

Missing semi-colons
Finish up support

- Fixup the nonce check
- Remove the "No Thanks" button as Thickbox can be closed elsewhere
-
Switch to the PHP 5.2 compatible version of Backdrop
Bring back the some javascript enhancements

- AYS modals when deleting / removing things
- Run the backup process in an ajax request
- Use Heartbeat to check on the running backup status
- Fire the cron test via ajax on page load
- Update the backup size via ajax if it's calculating in the background
- Toggle the time fields when swithing schedule recurrance
Snip snip
Show the spinner in the tab if a schedule other than the current is running