Improve dashboard template copying

[ale-cota]

Problem: Currently, when you want to use a template, you click "add dashboard" and then we just create a dashboard with the exact same name (e.g. Backend template), in viewing mode. If the name is taken, we do append "copy", then "copy 1" but not the first time. This can result in some confusion, e.g. this anecdote:

huh, I looked at this again and I’m not sure how I screwed this up. I think the old name of the dashboard may have had “Template” in it. perhaps the feature request is that when you do “Add Dashboard” from the list across the top, you are asked to give it a name. It’s confusing that e.g. the Mobile Template Add Dashboard button adds a dashboard called “Mobile Template.”
what we do today is pre populate the name wiith “template” which may sometimes add confusion. the customer here is suggesting we make the name field manadotory and not autopopulate it
👍
rationale:
yeah, so what I think happened was a long time ago nova cloned “Systems Template” and if there’ no extant dashboard with that name, the new dashboard will also be called “Systems Template.” so I saw the dashboard named “Systems Template” and edited it, thinking it was a template, not an instance

Suggested solution:

• append "copy" from the first time the template is used
• open the dashboard in "edit mode" in order to encourage the user to rename their dashboard.