Improve module UX

Someone recently recommended this module to me as I wanted ajax behaviour/history when using the search api with a s search api/olr view.

I did eventually manage to install and enable but found this a little trickier than it could be. The main issues I faced were:

1. There is no README in the module to explain how to enable the module.
3. The actual checkbox to enable this is hidden away in the View UI.

I have added a screenshot to demonstrate this last point.

Now I know where it is it's fine, however, I do feel that it might be better to show this button (perhaps greyed out or hidden is ajax is NOT enabled) at the top level.

Then in README you could explain that the option to enable the behaviour is under the advanced setting tab.