Some users have difficulty finding the circuit display

In recent usability testing conducted for ~"Sponsor 30" @nah discovered that:

During this study, participant 3 pointed that they never used the New Circuit because they didn't know where it was. And as most browsers use the padlock to show website certificate, so they would never look for it there. They suggested to change the icon for the New Circuit, to make it more visible.(tpo/ux/research#91 (comment 2840558))

This has also been reported by an independent user researcher here: tpo/ux/research#34 (closed)

And came up during user interviews for Sponsor 101 too: tpo/ux/research#70 (closed)

If possible, I'd like to explore potential fixes for this issue in time for the usability testing scheduled in March/April.