Use admin_post hook
New line at end
Remove unneeded code
Modify action URLs to use the admin_post hook
Check nonces
Enable support action links
Pass the nonce around in the ajax request
None check
Use a new function that persists form submission errors to  a transient
Form submission handling for BWP and add-ons settings
fetch errors to display
Rename nonce and action
Adds some functions to manage settings form submission errors
Adds function for building admin action urls
Update exclude rule action
Prefix GET params
Rename function
Add error message
Merge pull request #562 from humanmade/enhancement/issue-562

Use admin_post for hooking actions