Satori treemap depth controller: Click the up-arrow, but the down-arrow gets highlighted

[mccalluc]

• Specific code commit: 58aa066
• Version of the web browser and OS: MacOS Chrome
• Environment where the error occurred (Vagrant VM and site conf mode or AWS instance): Test Production

Steps to reproduce

Please list all the actions and the input data used:

1. Bring up Satori
2. On the depth controller, click the up-arrow
3. Control disappears momentarily during redraw: This behavior isn't unreasonable, but I'm not sure it's intended either.
4. Without moving the pointer, click the up again again.

Observed behavior

• The depth is not updated (Satori treemap depth controller requires mouse movement (Chrome only) #1909), and
• The down-arrow part of the controller is highlighted momentarily

Expected behavior

• The part of the controller which is clicked on should get the highlight, but
• If the intended behavior is to hide the controller during redraw, then the blue highlight shouldn't matter, whether it's up or down.