Assistant: Use frames instead of big buttons in router

So far we had in the router big buttons with all the content describing the corresponding option. Let’s try to have frames instead with only a small button to choose it. The content of these buttons can then make it clear that it’s the end of the router (when it is).

Feature Branch: web/9559-small-buttons

Parent Task: #9445 (closed)

Original created by @sajolida on 9559 (Redmine)