Description of problem:
Despite having the rename files extension enabled, there is no option to rename a file.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Open gthumb
2. Select a file
3. Right click to get menu and look around the various menus.
No rename option that I could find.
I expected the rename on the right-click menu.
Edit > Rename, or F2.