Site Editor: Provide a way to edit custom template names

[jameskoster]

It should be possible edit the name of a template (or template part) that has been created from scratch.

One minimal approach would be to allow the template name to be clicked and edited directly:

rename.mp4

This action should be available on template list view as well:

From this perspective perhaps a modal might work better. That same modal could be invoked from both the list view, and the editor view.

[Mamaduka]

@jameskoster, what do you think about using UI from Template Mode?

[jameskoster]

That seems a little prominent to me, but it would be good to be consistent for now, and revisit holistically later 👍