Bug 1004137 - [email] Absolute positioned virtual list regression: Refresh-synced folder not showing newly added message outside date range. r=jrburke. a=1.4+

uplift https://github.com/mozilla-b2g/gaia/pull/19007
https://github.com/mozilla-b2g/gaia/commit/e51f41c910e5d27953f256a293cd0e9036359e33