chg: [markdownViewer] Improved top bar UI and added editor helpers
chg: [markdownViewer] Improved top bar UI and added editor helpers

SteveClement/MISP,SteveClement/MISP,MISP/MISP,MISP/MISP,MISP/MISP,MISP/MISP,SteveClement/MISP,MISP/MISP,SteveClement/MISP,SteveClement/MISP