上拉加载更多时多次拖动列表，加载完成后手指下滑时列表反向滚动

[jingzhanwu]

设置 physics: const BouncingScrollPhysics(), 多次手指向上滑动后 页面出现缩放回弹效果，导致页面布局和字体反复放大回弹
如果设置为 physics: const ClampingScrollPhysics(),上拉加载时正常，但下拉刷新时会连续回弹两次，并且页面布局和字体也是出现放大回弹效果
SmartRefresher(
controller: model!.refreshController,
enablePullUp: true,
onRefresh: () => model.refresh(),
onLoading: () => model.loadMore(),
physics: const BouncingScrollPhysics(),
child: CustomScrollView(
slivers: [
SliverToBoxAdapter(child: _buildStoreAndDateRow()),
SliverToBoxAdapter(child: _buildHeadTotalView()),
_buildListView(model),
],
),
)

[qitaotao]

RefreshConfiguration(
headerTriggerDistance: 80.0,
springDescription: const SpringDescription(
stiffness: 80,
damping: 16,
mass: 1.9,
),
maxOverScrollExtent: 80,
maxUnderScrollExtent: 0
)