Cosmetic change to the admin page

[yubiuser]

I like it and personally would combine it with

Add time range info to all items on dashboard

I like to suggest a small improvement to the dashboard. While it clearly states what time range is used for "Total queries over" and "Client activity" (namely "over the last 24h") [Bildschirmfoto zu 2020-04-17 11-18-52] this information is missing for the other items/sections on the dashboard. [Bildschirmfoto zu 2020-04-17 11-18-57] While one can assume/guess it is also 24h (what it is in default) it would be nice if it would be written there. I suggest to change the wording "Top Permitted…