keymap editor: Adjust the "edit in keymap.json" button (#39789)

Making its visuals and positioning more consistent with the same button
in the settings UI.

Release Notes:

- N/A
a960db6a43Danilo Leal committed on 10/8/2025, 4:03:15 PM· committed by GitHubparent5a0f796
1 file changedLine totals unavailable