Add "OFFSET" to Stream.tsx

src/js/components/Stream.tsx

@@ -14,6 +14,14 @@ interface Props {
   t: TFunction;
 }
 
+/*
+  Provides a number that increments the value of the 'top'
+  parameter given to scrollBy() during auto-scroll. This
+  variable came from the scroll height provided by iOS being
+  less than expected.
+*/
+const OFFSET = 100;
+
 export function Stream({
   recitation,
   surah,