I'm using both Share Buttons by AddThis and Smart Layers by AddThis.
Share Buttons by AddThis contains parameter called "Enable enhanced accessibility" which adds "ui_508_compliant":true to webpage source.
As soon as I activate it, it affects Smart Layers: the very last button called "More" starts opening new tab/window instead of creating popup upon page content.
Is this a bug? Can't find any description for "Enable enhanced accessibility" setting. What does it do?