small layout updates; security fixes; piechart visualization update

package-lock.json

package.json

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

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

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

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

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

src/app/utils.ts

src/index.html

src/stylesheets/bulma.scss

src/stylesheets/styles.scss

src/stylesheets/variables.scss