In the new version of the powerbi website the refresh status of the datasets have been removed.
This would show a spinning circle of dots whilst refreshing and a yellow exclamation mark (!) if there was a failure on the refresh.
This was very useful to quickly determine if the dataset had refreshed successfully or was in the process of refreshing. Now you have to look on each dataset and check refresh history? This indicator was where the red line was in the picture below.