Mod Name change - add a warning or reconnect the mod

If the name is changed in the Manifest editor, the Mod Tool still points to the old mod directory. Maybe we can add:

A: An option to rename the mod, including the mod directory.
B: Add a warning to let the user know they have to reconnect the mod once everything is renamed.
C: Attempt to reconnect the mod with the new name. If there is no mod directory with that name yet, show the warning from option B.

Start by tracing how the Manifest editor records a changed mod name and how the Mod Tool resolves its mod directory. Compare the three proposed behaviors—renaming the directory, warning and requiring reconnection, or attempting reconnection—and define the selected behavior's success and missing-directory outcome.

Written by the indexing model from the issue text.