CardHeadline:With Container Overrides

Build 8467 on fairground/fix-branded-palette-overrides
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Baseline History
Build 84676095d5e
Current build. There are unaccepted changes, so build 8411 is still the baseline.
Build 841136a4004 current baseline
Accepted by Charlotte Emms.
Build 74806cf512a
Auto-accepted
Build 4768ead3147
Accepted by Daniel Clifton.
Build 4742deb1225
Accepted by Daniel Clifton.
Commenting is disabled because there's a newer build on this branch