Set aspect ratio for cam4 thumbs to 16/9

client/src/main/java/ctbrec/ui/sites/cam4/Cam4TabProvider.java

@@ -42,6 +42,7 @@ public class Cam4TabProvider extends AbstractTabProvider {
     private Tab createTab(String name, String url) {
         var updateService = new Cam4UpdateService(url, false, (Cam4) site);
         var tab = new ThumbOverviewTab(name, updateService, site);
+        tab.setImageAspectRatio(9.0 / 16.0);
         tab.setRecorder(recorder);
         return tab;
     }