BI-126486 fix: 分组表滚动条拖不动【样板客户】

src/base/collection/collection.js

@@ -345,7 +345,7 @@ BI.CollectionView = BI.inherit(BI.Widget, {
             return;
         }
         this._scrollLock = true;
-        this.options.scrollLeft = BI.clamp(scrollLeft || 0, 0, this._getMaxScrollLeft());
+        this.options.scrollLeft = BI.clamp(scrollLeft || 0, 0, this._getMaxScrollLeft() || scrollLeft);
         this._debounceRelease();
         this.element.scrollLeft(this.options.scrollLeft);
         this._calculateChildrenToRender();
@@ -356,7 +356,7 @@ BI.CollectionView = BI.inherit(BI.Widget, {
             return;
         }
         this._scrollLock = true;
-        this.options.scrollTop = BI.clamp(scrollTop || 0, 0, this._getMaxScrollTop());
+        this.options.scrollTop = BI.clamp(scrollTop || 0, 0, this._getMaxScrollTop() || scrollTop);
         this._debounceRelease();
         this.element.scrollTop(this.options.scrollTop);
         this._calculateChildrenToRender();