layout fix + off-by-1 for students

Author: lennertdr

frontend/src/app/components/assignment/assignment.component.less

@@ -60,4 +60,6 @@
 .inline {
   display: flex;
   flex-direction: row;
+  width: 100%;
+  justify-content: center;
 }

frontend/src/app/components/assignment/assignment.component.ts

@@ -192,11 +192,12 @@ export class AssignmentComponent implements OnInit {
     progressObservable.subscribe(
       (res) => {
         this.progress = res;
-        this.step = this.progress.step;
+        this.step = this.progress.step - 1;
         this.furthestStep = this.progress.step; // furthest step is always returned by progress
         this.alreadySubmitted = this.step < this.furthestStep
         this.maxStep = this.progress.maxStep;
         this.loading = false;
+        console.log(this.step, this.furthestStep, this.maxStep)
       }
     )
   }