Merge branch '1043987-wrong-participant-couting' into '2020.0'

1043987 wrong participant couting

See merge request xrm/basic!132

(cherry picked from commit 7c5f54e7)

1ffcd3ad Zwischencommit.
ded86f37 merged 2020.0 into 1043987-wrong-participant-couting
9dcbb756 merged 2020.0 into 1043987-wrong-participant-couting
0c9cc14d #1043987 - Added validation of "$this.value" in if condition.
dc31c7c1 #1043987: Disabled line in changelog.xml for example data.