#3591838 prevent duplicate names
Replaced the not-working UniqueNamePerFolderTypeConstraint with the broadly applied UniqueColorNameConstraint and added e2e test for it.
Testing instructions
- Try to create a color with a name that exists - note it is prevented w/validation message in the form
- Try to update the name of a color to that of one that exists - note that it is prevented with a validation message appearing below the inline input.
Closes #3591838 (closed)
Edited by Ben Mullins