Added support for 'displayVariant: omit' to ERModern
This handles only the 'omit' variant, not the CSS manipulation. See the original commit by Travis Cripps: https://github.com/wocommunity/wonder/commit/0aa09a0cef93772fa7ba4629babac5130ff11a83
Merge pull request #578 from fbarthez/ERModern-displayVariant_omit

checked with my old D2W code and should be fine.