1 | | It comes from some strange CSS set starting in [21699] (my check in) to the Select menu, which looks like I can remove. That fixes the listed issue although then there's a problem when a vertical scrollbar causes a horizontal scrollbar to appear too, like the maxHeight=200 example in test_Select, so that requires another fix. |
| 1 | The strange initial offsetWidth comes from some strange CSS setting overflowX and overflowY on the Select menu, starting in [21699] (my check in). It looks like your patch to _HasDropDown worked because it nullified that CSS setting, so I can fix the problem by just removing that CSS. |
| 2 | |
| 3 | There's another problem when a vertical scrollbar causes a horizontal scrollbar to appear too, like the maxHeight=200 example in test_Select, so that requires another fix. |