Revert spinbox style
We will have to revert the spinbox style to the old style for 5.24. We had to revert the style for 5.23 on the 5.23 branch just before release to prevent users from facing issues and we still haven't figured out an acceptable way to make the new style work with all apps. Might as well revert it on master at this point.
Qt Widgets apps and even some Qt Widget APIs (such as stylesheets) are designed for spinboxes that stack 2 buttons vertically, not horizontally on either side of the field. Unless Qt adds a way to specify whether or not to use the traditional spinbox layout as a Qt Widget API, Qt Widgets apps will just have to use the traditional style forever.
previous discussion: !142 (closed)