Fix Process detail accessibility issues

- Made Process Output keyboard accessible

Author: alexandrevryghem

src/app/process-page/detail/process-detail-field/process-detail-field.component.spec.ts

@@ -32,7 +32,7 @@ describe('ProcessDetailFieldComponent', () => {
   });
 
   it('should display the given title', () => {
-    const header = fixture.debugElement.query(By.css('h4')).nativeElement;
+    const header = fixture.debugElement.query(By.css('h2')).nativeElement;
     expect(header.textContent).toContain(title);
   });
 });

src/app/process-page/detail/process-detail.component.html

@@ -53,7 +53,7 @@ <h2 class="flex-grow-1">
         </button>
         <ds-themed-loading *ngIf="retrievingOutputLogs$ | async" class="ds-themed-loading"
                            message="{{ 'process.detail.logs.loading' | translate }}"></ds-themed-loading>
-        <pre class="font-weight-bold text-secondary bg-light p-3"
+        <pre class="font-weight-bold text-secondary bg-light p-3" tabindex="0"
              *ngIf="showOutputLogs && (outputLogs$ | async)?.length > 0">{{ (outputLogs$ | async) }}</pre>
         <p id="no-output-logs-message" *ngIf="(!(retrievingOutputLogs$ | async) && showOutputLogs)
       && !(outputLogs$ | async) || (outputLogs$ | async)?.length == 0 || !process._links.output">