[popover2] fix(Popover2): use more specific overlay backdrop selector #4621
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Changes proposed in this pull request:
Make Popover2's backdrop style CSS selector more specific so that it is guaranteed to override the styles in
_overlay.scss
in core. Before this change, we encountered some rare situations where this was not the case, and the default overlay backdrop gray color was visible.Reviewers should focus on:
No regressions
Screenshot