When flattening url action reports the
default_action_name (default: index) is still contained in the labels.
This changes will remove that.
Also, I think there's probably test coverage for flattened actions reports, but if not, would be good to cover this change in a test.
The default action name will still be displayed for non flattened reports. Changing it also won't change any old reports...
I have seen that. I'm not yet sure how to solve that best without regressions... Need to investigate that further...