Backport [Canvas][Layout Engine] Persistent grouping #25854#27459

Merged

w33ble merged 1 commit intoelastic:6.xfrom w33ble:bp/25854

Dec 19, 2018

+811-394

Commits on Dec 18, 2018

[Canvas][Layout Engine] Persistent grouping (elastic#25854 )

monfera
authored and
w33ble
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