Multiple panels of material in properties tab were not
collapsed/expanded when click-dragged over them. This is because wrong
button type for interface-panel. To support multi-drag, button has to be
of type toggle, see: `ui_do_but_ANY_drag_toggle()->
ui_drag_toggle_but_is_supported`
Pull Request: https://projects.blender.org/blender/blender/pulls/135154
255dec2c51