Revert "Fix backwards brace"

This reverts commit b9c6072ba9450a3c500673e2d4b667e12145d7f0.
Revert "Allow derived classes to dynamically set the channel"

This reverts commit 6553cd2296d7dece3cff06c7f9202764c9f0b392.
Set channel in the route defaulting to "default"
Make the default a controller parameter instead of a route parameter
Pass the channel parameter in the twig template as appropriate