Fix renaming a feature when the target name is only different from the original name with its case

The rename feature fails with an exception when trying to rename a feature with a case change.
Steps to reproduce:

1. in one's Studio project, navigate to Automation > Automation Chains
2. in the list of the Automation Chains, one of them is named testme
3. click on the rename button
4. enter the new value TestMe
5. a popup is displayed with this message

   com.google.gwt.safehtml.shared.OnlyToBeUsedInGeneratedCodeStringBlessedAsSafeHtml@aa939048

Expected:
I should be able to rename a feature with a different case