refactor: application start page: rename Lechapt-Calmon calculator to Pressure loss

src/app/calculators/pressureloss/config.json

src/app/calculators/pressureloss/en.json

src/app/calculators/pressureloss/fr.json

...p/components/calculator-list/calculator-list.component.ts

src/app/config.json

src/locale/messages.en.json

src/locale/messages.fr.json