Comment 52 for bug 39328

oliwek, try this (haven't tried it myself so you might have to improvise a bit ;-) )

First we need to build libwnck and install libwnck

# cd
# mkdir temp
# cd temp
# apt-get build-dep libwnck
# apt-get source libwnck
# cd libwnck-2.26.0
# cp /path/to/10_wnck_scroll_enabled.patch debian/patches/
# dpkg-buildpackage -rfakeroot -b -tc
# sudo dpkg -i ../libwnck*.deb

Then we need to build and install gnome-panel

# cd
# cd temp
# apt-get build-dep gnome-panel
# apt-get source gnome-panel
# cd libwnck-2.26.0
# cp /path/to/scroll_gui.patch debian/patches/30_scroll_gui.patch (from http://bugzilla-attachments.gnome.org/attachment.cgi?id=138627)
edit debian/patches/series (eg with nano) and add a line with "30_scroll_gui.patch" after "28_prefer_lvds_monitor.patch"
# dpkg-buildpackage -rfakeroot -b -tc
# sudo dpkg -i ../*panel*.deb

Kill gnome-panel (or relogin) and hopefully things will work, if they don't, comment here and I'll see if I can fix a PPA for this.