More UI tweaks (#10974)

* Show loading indicator when switching between preview and recording if it takes a while

* Scroll down to avoid automatic upscroll

web/src/pages/Logs.tsx

@@ -279,6 +279,9 @@ function Logs() {
                 }
               })
               .catch(() => {});
+            contentRef.current?.scrollBy({
+              top: 10,
+            });
           }
         });
         if (node) startObserver.current.observe(node);