Fixed Graph2D component namespace

Frontend Angular 4/package-lock.json

...d Angular 4/src/app/layout/matefun/matefun.component.html

...end Angular 4/src/app/layout/matefun/matefun.component.ts

Frontend Angular 4/src/app/layout/matefun/matefun.module.ts

...r 4/src/app/layout/plotter/graph2D/graph2D.component.html

...lar 4/src/app/layout/plotter/graph2D/graph2D.component.ts

...ngular 4/src/app/layout/plotter/graph2D/graph2D.module.ts

...ngular 4/src/app/layout/plotter/graph2D/graph2D.routes.ts

Frontend Angular 4/src/app/layout/plotter/graph2D/index.ts

Frontend Angular 4/src/app/layout/plotter/plotter.routes.ts