DashControl Save/Save As

[spalger]

From #392

I've caught myself doing something in the last couple days:

1. Load a dashboard from Elasticsearch
2. Modify this, that, then click "Set as My Default"
3. Reload and surprise! I don't see my changes
4. Refresh furriously, restart chrome
5. Realize that I'm still reading from Elasticsearch and not from the save that I just created

I think it might make sense to enhance the dashControl panel to behave similarly to the "Save" and "Save As" functionality we've grown used to over the years:

• Save edits the version we are currently using in place (es, localStorage, etc)
• Save As saves to a new location + switched the route to read from that new file.

This would prevent similar moments of frustration in the future and is probably expected behavior for most users.

[rushi]

+1

This would be good to have, especially when you are setting up dashboards and doing rapid iterations.

[rashidkpc]

459e117 implemented here