[7.x] [Fix for Vis Editor] Revert setting time field to empty string when it's undefined (#58873)#59407

Merged

maryia-lapata merged 1 commit intoelastic:7.xfrom maryia-lapata:backport/7.x/pr-58873

Mar 5, 2020

+44-6

Commits on Mar 5, 2020

[Fix for Vis Editor] Revert setting time field to empty string when it's undefined (elastic#58873 )

maryia-lapata
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elasticmachine
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