Revert to default

How about creating an option solely for reverting the whole page to default this way when someone wants to test a new theme he/she may not have to select each visual and click revert to default.
OR
Any ideas for a theme that can do the same?
This will save a lot of time while creating and importing a theme.

I tried using the zip fie for one of my power bi reports it contains the base theme for it but it still does get reverted if I import it on a new report.