documents updated
Merge branch 'master' into '7-4-stable'

Merge master into 7-4-stable

See merge request !1189
Merge branch '7-4-stable' into 'master'

7-4-stable to master

See merge request !1191
Increase participants block margin

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>