 Bugfix FXIOS-3673 [v103] show previously closed private tabs when opening new private browsing tabs (#11114)
 Bugfix FXIOS-3673 [v103] show previously closed private tabs when opening new private browsing tabs (#11114)

Reset screenshot image on prepareForReuse to avoid showing previous tab 
mozilla-mobile/firefox-ios,flodolo/firefox-ios,mozilla-mobile/firefox-ios,flodolo/firefox-ios,mozilla-mobile/firefox-ios,mozilla-mobile/firefox-ios,flodolo/firefox-ios,mozilla-mobile/firefox-ios,mozilla-mobile/firefox-ios,flodolo/firefox-ios,flodolo/firefox-ios,mozilla-mobile/firefox-ios,flodolo/firefox-ios,flodolo/firefox-ios