MBStyles: text-offset is expressed in ems, not pixels

Description

Current code translates it using pixels, ending up off the mark. See spec:
https://docs.mapbox.com/mapbox-gl-js/style-spec/#layout-symbol-text-offset

Environment

None

Assignee

Andrea Aime

Reporter

Andrea Aime

Triage

None

Components

Fix versions

Priority

Medium
Configure