Change design of federation pages in admin UI (#17704)

* Change design of federation pages in admin UI

* Fix query performance in instance media attachments measure

* Fix reblogs being included in instance languages dimension

app/lib/admin/metrics/measure/base_measure.rb

@@ -26,6 +26,14 @@ class Admin::Metrics::Measure::BaseMeasure
     raise NotImplementedError
   end
 
+  def unit
+    nil
+  end
+
+  def total_in_time_range?
+    true
+  end
+
   def total
     load[:total]
   end