campnowhere , OK, first of all you are right it would be nice for user name and password to be editable.
Reason why it's not done is:
- it's so simple to remove the user with the Remove button above and reenter changed data as there is not much of it and changing it after setting is so rare. Complicating the code for anything that rarely used is unnecessary risk.
- editing on the main list is not readable, no confirm password field, so it must be done in that user add popup.
No edit button for anything else, so adding it would be bloat for that purpose only.
That said, it is not that hard to implement, for example if a user is selected, Add User becomes edit, when pressed it automatically copies the values to the create user window and prefills the existing data, deleting the user in the background on OK, and readds.
Or would it be too confusing to those that wonder "where is the Add button all of the sudden".
A dropdown on Add, as an edit, would be perfect, but is it hidden when disabled so the unnecessary dropdown is confusing, needs testing.
Will add to the todo list, but cannot promise it, these additions are a luxury item.