Merge branch 'security-11-4-54377-label-milestone-name-xss' into 'security-11-4'
[11.4] Escape label and milestone titles to prevent XSS in GFM autocomplete See merge request gitlab/gitlabhq!2742
[11.4] Escape label and milestone titles to prevent XSS in GFM autocomplete See merge request gitlab/gitlabhq!2742