Add logging on scroll

lib/controls/timeline/post_control.dart

@@ -75,6 +75,9 @@ class _PostControlState extends State<PostControl> {
     final int count = items.length;
     final int scrollToIndex = _scrollToIndexCalc(items);
 
+    // TODO Figure out why doesn't scroll to correct position on loading
+    _logger.finer('Building view with initial position at $scrollToIndex');
+
     return ScrollablePositionedList.builder(
         physics: const AlwaysScrollableScrollPhysics(),
         itemCount: count,