[7.x] [Discover] Convert legacy sort to be compatible with multi sort (#76986)#77334

Merged

kertal merged 1 commit intoelastic:7.xfrom kertal:backport/7.x/pr-76986

Sep 14, 2020

+16-1

Commits on Sep 14, 2020

[Discover] Convert legacy sort to be compatible with multi sort (elastic#76986 )
kertal
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