Find a better way to know a difficulty filter is activated
Previously https://phabricator.kde.org/T10272:
There has been several times people not knowing a difficulty filter was activated and don't have all the activities displayed (for example: https://bugs.kde.org/show_bug.cgi?id=402877).
Can we find a way to know there is a filter?
Comment from Timothée at the time:
I agree this is a good idea, we should add something to indicate when there is a filter.
I'll start thinking about it and propose something soon.