[7.x] [Lens] Stack as percentage (#70703)#77455

Merged

flash1293 merged 1 commit intoelastic:7.xfrom flash1293:backport/7.x/pr-70703

Sep 15, 2020

+1,149-229

Commits on Sep 15, 2020

[Lens] Stack as percentage (elastic#70703 )
flash1293
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