[O] Bug: org-beamer-select-environment (ox-beamer.el) should temporarily disable persistent tags

[Anders Johansson]

Hi,
Having some persistent tags configured (in org-tag-persistent-alist) 
means those get added to the selection window for 
org-beamer-select-environment possibly interfering with the selection of 
beamer environments.

These tags should be explicitly disabled in the let in 
org-beamer-select-environment:

(org-tag-persistent-alist nil)


Cheers,
Anders Johansson