update height on display

app/static/js/pandora-scroll.js

@@ -29,6 +29,18 @@ class PandoraScroll extends HTMLElement {
             video.muted = true
         })
     }
+    this.updateAnnotationHeight = function() {
+        var height = 0
+        var text = shadow.querySelector('.text')
+        text.querySelectorAll('.annotation.single').forEach(annotation => {
+            var rect = annotation.getBoundingClientRect()
+            console.log(annotation, rect.height)
+            if (rect.height > height) {
+                height = rect.height
+            }
+        })
+        text.style.height = height + 'px';
+    }
   }