77107 Improve error messaging and documentation for Scrollbar.isAlwaysShown (a: error message, cla: yes, d: api docs, d: examples, documentation, f: scrolling, framework, waiting for tree to go green)

77755 Fix scrollbar hit testing based on pointer device kind (a: desktop, a: quality, cla: yes, f: material design, f: scrolling, framework, platform-web, waiting for tree to go green)

79297 Add scrollbar tests for simultaneous scroll/drag (a: tests, cla: yes, f: cupertino, f: material design, f: scrolling, framework, waiting for tree to go green)

platform-web - 9 pull request(s)

76102 improve the scrollbar behavior when viewport size changed (a: desktop, a: quality, cla: yes, f: scrolling, framework, platform-web, waiting for tree to go green)