[infra] gerrit is:mergeable predicate

Hello Infra team, In Gerrit 3.4, the is:mergeable predicate is disabled by default [0]. It was kind of handy to be able to screen out patches that are in merge conflict when looking for reviews. Is there an alternative way of doing this, or would you be averse to restoring the previous behavior? (I promise not to complain about gerrit performance.) cheers, brian [0] https://www.gerritcodereview.com/3.4.html#ismergeable-predicate-is-disabled-...