Marketplace icon redesign and missing cache language string.
- Redesigned the Marketplace listing icon: a browser window with a guiding
cursor and a small lock badge, replacing the previous shield+lock design
so the icon reads as "co-browsing support inside Moodle" rather than a
generic security icon. - Added the
cachedef_eventratelimitlanguage string (English and
Spanish), required by theeventratelimitcache definition in
db/caches.phpand missing since that cache was introduced.
Full details in CHANGELOG.md.