[7.3] [Canvas] Fixes toggle between edit mode/read only mode (#41293)#41312

Merged

cqliu1 merged 1 commit intoelastic:7.3from cqliu1:backport/7.3/pr-41293

Jul 17, 2019

+11-2

Commits on Jul 17, 2019

[Canvas] Fixes toggle between edit mode/read only mode (elastic#41293 )
cqliu1
committed