TextBlockComponent:Automatic hyperlink near the start

Build 7469 on cemms1/document-outline-epic
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Baseline History
Build 74692dc6bee
Current build. There are unaccepted changes, so build 4889 is still the baseline.
Build 488904bff13 current baseline
Accepted by Daniel Clifton.
Build 4536efdeada
Accepted by Sophie.
Build 3941e49cd79
Accepted by Sophie.
Build 3767097326c
Accepted by Alina Boghiu.
Commenting is disabled because there's a newer build on this branch