fix fullscreen with enter

src/app/components/shared/header/header.component.html

@@ -5,7 +5,7 @@
             matTooltip="{{'header.back' | translate}}">
       <mat-icon class="header-icons">arrow_back</mat-icon>
     </button>
-    <button mat-icon-button aria-hidden="true" *ngIf="isSafari === 'false'">
+    <button mat-icon-button aria-hidden="true" *ngIf="isSafari === 'false'" (click)="getRescale().toggleState();">
       <mat-icon class="header-icons" (click)="getRescale().toggleState();">fullscreen</mat-icon>
     </button>
     <span class="fill-remaining-space"></span>