Current case is clear as the wanted icon is out of range of any offline icon set the dashboard provides. And yes, for the online case the iconify choice is the best one. Sadly I couldn't find any description in docs to describe how to use iconify icons. My skills of search may of course can be limited. But seems like it is hidden treasure of dashboard until somebody with well enough English skills takes to write it up. And again with my skills I'm not qualified.
Hope somebody takes it from this point, cos it really is good addition to dashboard (for online case)