Replace width 100% with flex grow

Firefox and chrome interpret 100% inside a flex layout differently. Chrome tries to assign the `spacer` a width of 100% by shrinking the public record component. Leading to a screwed display.
By telling the browsers that the spacer should expand instead of that the spacer should fill the full width, both firefox and chrome display the component correctly.

Author: KochTobi

user-interface/src/main/java/life/qbic/datamanager/views/account/AccountContentBox.java

@@ -42,7 +42,7 @@ public AccountContentBox(String orcidId, URI record) {
     publicRecord.add(new Anchor(record.toString(), "View public record", AnchorTarget.BLANK));
 
     var spacer = new Div();
-    spacer.setWidthFull();
+    spacer.addClassNames("dynamic-growing-flex-item");
 
     add(iconContainer, accountInfo, spacer, publicRecord);
   }