It is a class provided by bootstrap and one of its most
important job is to set the display of inputs and labels in
the form in such a way that if there is sufficient
horizontal space then they are shown side by side.
As we override most of the bootstrap classes to organize
content, CSS rules set by it were not applied. So we remove
these safely without having any visual changes. Also, we had
only three instances of this class in the complete template
directory.
Original email address is shown to admin users in subscriber list when
email_address_visibilty is set to "Admins only" by passing delivery_email
at required places. Email address are not shown to non-admin users when
visibility is set to "Admins only".
Tweaked by tabbott to fix a few bugs and dead code.
Fixes a part of #13541.
User IDs are more robust than email addresses as they don't change
with time, and also don't have complications with
different email_address_visibility settings.
m-e-l-u-h-a-n
sahil839
Tim Abbott
Anders Kaseorg