Fixes the widget scrolling issue in #46 and an, as it turns out, unrelated issue that made it impossible to scroll the Styling Options list (on Linux, wx's GTK backend).
(Both were ultimately because the existing MSE code was actively preventing the scroll position from being set correctly.)
Not surprised that MSE was doing something custom. There seems to be a lot of that and it doesn't always translate to other platforms.
Lemme give this a try on Windows and just verify that still is happy.
Fixes the widget scrolling issue in #46 and an, as it turns out, unrelated issue that made it impossible to scroll the Styling Options list (on Linux, wx's GTK backend).
(Both were ultimately because the existing MSE code was actively preventing the scroll position from being set correctly.)