Merge branch 'security-11-5-54377-label-milestone-name-xss' into 'security-11-5'
[11.5] Escape label and milestone titles to prevent XSS in GFM autocomplete See merge request gitlab/gitlabhq!2741
[11.5] Escape label and milestone titles to prevent XSS in GFM autocomplete See merge request gitlab/gitlabhq!2741