Fix/scrolling vertically nav button bug issue #14785

[joelwass]

Submitter Checklist:

• Submitted a ticket for my issue if one did not already exist.
• Used Github auto-closing keywords in the commit message.
• Added/updated tests for this change (for new code or code which already has tests).
• Ran git rebase -i to squash commits (if needed).
• Tagged reviewers and labelled the pull request as needed.
• Request a security/privacy review as needed. (Ask a Brave employee to help if you cannot access this document.)

Test Plan:

Check out issue #14785 for a description of the issue.

The problem was we were never resetting the isSwipeOnRightEdge or isSwipeOnLeftEdge values once they were set to true. So once the 'seal was broken' per se, these values were never both false anymore.

Here are associated gifs of before the fix and after.

Before fix:

After fix:

Reviewer Checklist:

• Request a security/privacy review as needed if one was not already requested.

Tests

• Adequate test coverage exists to prevent regressions
• Tests should be independent and work correctly when run individually or as a suite ref
• New files have MPL2 license header

[darkdh]

superseded by 69851d1