Merge branch 'tz-fix-copy-as-gfm-firefox' into 'master'
Transforming Gfm also on paste so it works also in FF Closes #57561 See merge request gitlab-org/gitlab-ce!25146 (cherry picked from commit 3dcdf16f) 10f496b5 Transforming Gfm also on paste so it works also in FF 8668cd52 Improved comments and added function to encapsulate logic