After upgrading our Tridion to 8.5, our custom GUI extensions are no longer working. The problem seems to be that it is no longer finding some resources in the old namespaces.
Based on a hint from this question we were able to get the following working
<%$ Resources: Tridion.Web.UI.Strings, Browse %>
by changing it to
<%$ Resources: Tridion.Web.UI.Editors.CME.Strings, Browse %>
But this does not work for
<%$ Resources: Tridion.Web.UI.Editors.CME.Strings, LinkPopupUrlLabel %>
How do we find where a resource like "LinkPopupUrlLabel" has moved? Is there a document that details the changes? Or is there a place to look within the folder structure or the repo?