Support syntax highlighting Also maps the API preferences to proper codemirror properties... See https://github.com/GerritCodeReview/gerrit/blob/6c1a52b8698d1ad392c590e7b515f2b5668e73f4/gerrit-gwtui/src/main/java/com/google/gerrit/client/editor/EditScreen.java#L555 Change-Id: Icc222cde89eff7a0992fbcaaf8e7bac560347c18