Selecting mentions in bulk

To perform an action that involves multiple mentions, start with selecting a mention by clicking its user picture and then select as many mentions as you need:

Then you can apply the standard set of options as Sentiment change, Adding to favorites, Marking as done, Blacklisting or Removing to all those mentions in bulk:

For choosing all mentions, there’s the Select all option. Select any mention and then hit the Select all button in the right top corner: