Merge branch 'release/10.2' into stable/10

Merge branch 'release/10.2' into stable/10

Merge branch 'release/10.1' into stable/10

Merge branch 'release/10.0' into stable/10

Use safe_join for joining flash messages

Merge branch 'release/10.0' into stable/10

Merge branch 'release/10.0' into stable/10

Merge branch 'release/9.0' into stable/9

Merge branch 'release/9.0' into stable/9

Merge pull request opf#7392 from opf/fix/30370/scope-not-set-allowed-…

…value-relative-url

[30370] Fix not allowed scope for relative URL root

[ci skip]