Revert "pjax: Fix confusing POST resubmit"

This reverts commit b6b2b857b5dddb13e700a29f2ab45171162bc908.
pjax: After a POST, disable pjax for the next click
pjax: Cancel autosave on navigation
pjax: Support detection of new deployment
v1.9.0

Change v1.8.2 to v1.9.0
Drop help tips for list properties