structured view changes

[mafo3186]

• [x] check contrast
• [x] no box in the back (background shadow) (via #123)
• [x] check visibility of waves
• [x] check readability of "title"

[mafo3186]

the title on the structured List view is not intended to be readable, for irritation of people. it is just readable to screenreaders. hovering reveals link, and it is clickable to get more information.

[mafo3186]

closed via #123