Remove overflow CSS settings on  !SelectMenu which cause chrome to report the wrong offsetWidth.   Also update _HasDropDown to not set the width or height of the dropdown except when necessary.   Fixes #15140 !strict.
Remove overflow CSS settings on  !SelectMenu which cause chrome to report the wrong offsetWidth.   Also update _HasDropDown to not set the width or height of the dropdown except when necessary.   Fixes #15140 !strict.

git-svn-id: 674a2d6b1e32e53f607eb824547723f32280967e@30698 560b804f-0ae3-0310-86f3-f6aa0a117693

kitsonk/delite,harbalk/delite,harbalk/delite,kitsonk/delite,Sam-Cummins/delite,Sam-Cummins/delite