Backport: Verify users belong to workspace before removing them#1549

zak39 wants to merge 1 commit intostable4.1arawa/workspace:stable4.1from

backport/check-users-presence-in-workspace-when-removing/1536/stable4.1arawa/workspace:backport/check-users-presence-in-workspace-when-removing/1536/stable4.1Copy head branch name to clipboard