Make indicators pop out when needed
Make indicators pop out when needed

When moving over a non-expanded indicator from the outside, we were
not expanding it, due to on_scrollbar being true. This can be seen
e.g. when moving from the content pane over to the sidebar indicator
in gtk3-demo. We must still ensure that the indicator is expanded
when receiving motion events over the indicator.

https://bugzilla.gnome.org/show_bug.cgi?id=747407

alexlarsson/gtk,alexlarsson/gtk,chergert/gtk,ahodesuka/gtk,grubersjoe/adwaita,jigpu/gtk,chergert/gtk,jadahl/gtk,chergert/gtk,grubersjoe/adwaita,ahodesuka/gtk,jigpu/gtk,jadahl/gtk,ahodesuka/gtk,Adamovskiy/gtk,grubersjoe/adwaita,ahodesuka/gtk,jigpu/gtk,Adamovskiy/gtk,jadahl/gtk,jigpu/gtk,grubersjoe/adwaita,chergert/gtk,jadahl/gtk,jadahl/gtk,davidgumberg/gtk,jadahl/gtk,alexlarsson/gtk,jigpu/gtk,Adamovskiy/gtk,jadahl/gtk,chergert/gtk,davidgumberg/gtk,grubersjoe/adwaita,alexlarsson/gtk,grubersjoe/adwaita,jigpu/gtk,Adamovskiy/gtk,alexlarsson/gtk,grubersjoe/adwaita,ahodesuka/gtk,Adamovskiy/gtk,alexlarsson/gtk,Adamovskiy/gtk,Adamovskiy/gtk,Adamovskiy/gtk,chergert/gtk,davidgumberg/gtk,ahodesuka/gtk,jigpu/gtk,jigpu/gtk,chergert/gtk,jadahl/gtk,alexlarsson/gtk,davidgumberg/gtk,ahodesuka/gtk,davidgumberg/gtk,davidgumberg/gtk,davidgumberg/gtk,chergert/gtk,alexlarsson/gtk,davidgumberg/gtk,grubersjoe/adwaita,ahodesuka/gtk