only update our own history entries during back navigation through VT #8116
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Changes
When the popState handler sees a entry without state, leave that alone.
The original code updated the entry and thereby introduced state.
A entry with state is viewed as an view transition entry.
Thus when navigating back, the transition gut animated
even though it wasn't when we walked forward in the first place
Testing
only manual tests
Docs
n/a. Bug fix.