Improve responsiveness and add doc to task

src/app/pages/gabinete-digital/gabinete-digital.page.ts

@@ -266,4 +266,11 @@ export class GabineteDigitalPage implements OnInit {
 
   }
 
+  selectedElementF(element:string) {
+    if (window.innerWidth >= 800) {
+      return element ==  this.selectedElement
+    }
+    return false;
+  }
+
 }