Show accessibility shortcomings in details

Refs #138.
Improve accessibility panel

Refs #138.
Add feedback section to accessibility panel

Refs #138.
Add short text to accessibility feedback collapse

Refs #138.
Add set accessibility profile link

Refs #138.
Add leave feedback link to accessibility details

Refs #138.
Add accessibility contacts as dummy data

Refs #138.
Add accessibility profile to accessibility panel

Refs #138.
Make app config more flexible
Add default values for route start and end points
Add breadcrumbs to service tree, closes #91