How to be avoiding immediate data refresh in grids when adding each field from Column Panel allows the user to add all the intended fields at once. Currently the users have to "click and wait" for the grid to refresh after each selection.
Clarity 16.3.0 and higher
A new feature toggle has been added Grid 'Columns' panel refresh behavior
You need to enable a feature toggle in Clarity UI (16.3.0 - 16.4.1)
In backend you can enable toggle F35399_GRID_REFRESH_COLUMN_PANEL by following Toggle a Clarity Feature