We source popup.css to get 'proper' popup styling of the fake panel in customize mode. We'll have to come up with some other way of doing that (and might have to do that anyway because of the other deps of bug 1352693, particularly aligning the icon with the right button, and using flexbox in bug 1373968 breaks some of it as well).
This was done as part of the changes to customize mode.
Status: NEW → RESOLVED
Last Resolved: a year ago
Resolution: --- → WORKSFORME
Priority: P3 → --
QA Contact: gwimberly
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