[7.x] Fixed adding an extra space character on selecting alert variable in action text fields (#70028)#70760

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YulNaumenko wants to merge 1 commit intoelastic:7.xfrom YulNaumenko:backport/7.x/pr-70028

+397-419

Commits on Jul 5, 2020

Fixed adding an extra space character on selecting alert variable in action text fields (elastic#70028 )
YulNaumenko
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