APOORV SACHAN authored May 29, 2020 and António Fernandes committed Jun 12, 2020

We have been creating either an entry or a label for the name field,
depending on whether we were able to edit the name or not.

In GtkBuilder UI definitions we cannot do this anymore, as we have
to define and build both the entry and the label.

So, in order to only show the one we want on each situation, we are
introducing a GtkStack to contain both.