export as graphml button

...p/components/analysis-panel/analysis-panel.component.html

...app/components/analysis-panel/analysis-panel.component.ts

src/app/config.ts

src/app/pages/explorer-page/explorer-page.component.html

src/app/pages/explorer-page/explorer-page.component.ts

...app/services/netex-controller/netex-controller.service.ts

src/app/utils.ts

src/stylesheets/styles.scss