message: Hide the correct editor buttons on the New Issue page
diff: /* Hide unnecessary comment toolbar items */
  .rgh-clean-rich-text-editor md-mention,
  .rgh-clean-rich-text-editor md-ref,
  -.rgh-clean-rich-text-editor markdown-toolbar > :nth-last-child(4) { /* H1, B, I */
  +.rgh-clean-rich-text-editor form#new_issue markdown-toolbar > :nth-last-child(5),
  +.rgh-clean-rich-text-editor form:not(#new_issue) markdown-toolbar > :nth-last-child(4) { /* H1, B, I */
  display: none !important; /* Has to override `.d-inline-block` */
  }
  