1701098 - Apply Proton styling to all buttons unless they opt out with native="true"

Status: NEW

(Firefox :: Theme, task, P3)

Description

[Mike Conley (:mconley) (:⚙️)]

I tried this initially in bug 1697947, but I broke too much stuff layout-wise. We should try again after Proton ships.

Basically, we should have all buttons share the same Proton-y styles, and not special-case buttons everywhere to apply those styles. We should use the same technique that we use for checkboxes and menulists, where a native="true" attribute reverts the style to what we've historically shipped.

Comment 1

[Mike Conley (:mconley) (:⚙️)]

Conservatively setting to 5 points mainly because there's likely a bunch of buttons that are going to be affected by this that might require some adjustment.