This way transient mouse movements over scrollbars don't cause flickering, and more spaced movements have it enabled shortly.
7f28077 scrolledwindow: Enable "hover" mode in scrollbars after a timeout
gtk/gtkscrolledwindow.c | 71 +++++++++++++++++++++++++++++++++++++----------
1 file changed, 57 insertions(+), 14 deletions(-)
Upstream: git.gnome.org