fixed Footer is sticky to the top

[aelam]

if stickyHeader is true, the footer could be sticky to the top

Changes in this pull request

Issue fixed: #1093

Checklist

• All tests pass. Demo project builds and runs.
• I added tests, an experiment, or detailed why my change isn't tested.
• I added an entry to the CHANGELOG.md for any breaking changes, enhancements, or bug fixes.
• I have reviewed the contributing guide

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[rnystrom]

@aelam check out the bot message, we need a changelog for 3.3 before we can merge this PR. Change looks good tho!

[facebook-github-bot]

@aelam has updated the pull request. View: changes

[jessesquires]

💯

[facebook-github-bot]

@rnystrom is landing this pull request. If you are a Facebook employee, you can view this diff on Phabricator.