msglist: ScrollToButton animation to use Curves.ease instead

Author: sirpengi

lib/widgets/message_list.dart

@@ -242,11 +242,11 @@ class ScrollToBottomButton extends StatelessWidget {
     final distance = scrollController.position.pixels;
     // Calculate time necessary if we're capping speed at 8pixels/ms (== 8000pixels/s)
     final speedLimit = (distance / 8).ceil();
-    final int durationMs = max(300, speedLimit);
+    final durationMs = max(300, speedLimit);
     scrollController.animateTo(
       0,
       duration: Duration(milliseconds: durationMs),
-      curve: Curves.easeIn);
+      curve: Curves.ease);
   }
 
   @override