Redundant horizontal scroll bar on exhibition pages when exhibition highlights are expanded

[pollecuttn]

What

Displaying the exhibition highlights causes a redundant horizontal scroll bar to appear lower down the page

The horizontal scroll is there for all viewport widths.

Where

It's usually just above the newsletter signup form e.g. on Jason and the Adventure of 254 https://wellcomecollection.org/exhibitions/ZZP8BxAAALeD00jo

but it's also seen below the related story/above the season info on Being human https://wellcomecollection.org/exhibitions/XNFfsxAAANwqbNWD

It's been on all the exhibition pages with exhibition highlights that I've checked: Jason https://wellcomecollection.org/exhibitions/ZZP8BxAAALeD00jo Kola nut https://wellcomecollection.org/exhibitions/ZmmnMhEAACAAF5Rm Being human https://wellcomecollection.org/exhibitions/XNFfsxAAANwqbNWD Medicine man https://wellcomecollection.org/exhibitions/Weoe4SQAAKJwjcDC Cult of beauty https://wellcomecollection.org/exhibitions/ZJ1zCxAAACMAczPA

To do

• [ ] Remove the redundant horizontal scroll bar