Attribute list's panes show up below rather than to the right at wide browser widths

[amoeba]

Possibly could close this one along with #910.

On https://arcticdata.io/catalog/view/doi:10.18739/A2RF5KF5N, I see at super wide browser widths:

and at narrower widths, I see what is expected:

It wasn't immediately clear to me what was going on but I did wanna report it.

[laurenwalker]

Which browser were you using? I can't seem to replicate this.

[amoeba]

A recent Chrome 72. I can reproduce it on Safari and Firefox too. For an idea of how wide I'm talking, the body element on my page is 2500px wide when I see this. The right pane snaps into place around at body width of 1920px or narrower.