MassUpdate +' Saving' Message / Image

Dears, good morning!
I searched about a specific subject here, however, I didn’t find it here. I’m using version 7.11.6 and I would like to know: Is it possible to make a saving message appear every time I use a mass update on the ListView in the module Calls via JavaScript or Logics Hooks?

As there is a lot of data to update, the user ends up forgetting that it is still running and ends up closing the window or changing pages. I tried to use BlockUI (js) in “before_save”, but without success.

Thank you all for your attention, hugs!