bash 5.1-rc1: how to disable highlight upon paste?

[Corey Hickey]

Hello,

I just installed bash 5.1-rc1, and I noticed that text pasted onto the 
command line is now highlighted (until another key is pressed).

From the changelog, it appears to be:

f. New active mark and face feature: when enabled, it will highlight the
   text inserted by a bracketed paste (the `active region') and the text
   found by incremental and non-incremental history searches.

Presumably from this patch:
https://lists.gnu.org/archive/html/bug-bash/2018-03/msg00056.html

I don't find this feature to my liking; how do I disable it? I was 
unable to find a reference in the manual.

I actually _do_ like the highlighting upon CTRL-R searches, so I would 
like to keep that enabled if I can, while disabling highlighting upon paste.

Thanks,
Corey