Improved scrollbar styling. Corrected line terminators on gtkrc

...el-gtk-theme/data/usr/share/themes/Trisquel/gtk-2.0/gtkrc

...share/themes/Trisquel/gtk-3.0/assets/header-separator.png

...are/themes/Trisquel/gtk-3.0/assets/header-separator@2.png

...r/share/themes/Trisquel/gtk-3.0/assets/switch-off-ins.png

...a/usr/share/themes/Trisquel/gtk-3.0/assets/switch-off.png

...sr/share/themes/Trisquel/gtk-3.0/assets/switch-on-ins.png

...me/data/usr/share/themes/Trisquel/gtk-3.0/gtk-widgets.css

...a/usr/share/themes/Trisquel/gtk-3.0/mate-applications.css

9.0/trisquel-gtk-theme/debian/changelog