searchbar: Add some spacing
searchbar: Add some spacing

When showing the close button, and placing a wide entry in the
middle, there was no separation at all. Fix this by setting
some spacing.

ahodesuka/gtk,grubersjoe/adwaita,chergert/gtk,jadahl/gtk,jadahl/gtk,jessevdk/gtk,alexlarsson/gtk,Lyude/gtk-,grubersjoe/adwaita,Lyude/gtk-,grubersjoe/adwaita,Sidnioulz/SandboxGtk,ahodesuka/gtk,jessevdk/gtk,Adamovskiy/gtk,Adamovskiy/gtk,davidgumberg/gtk,Adamovskiy/gtk,alexlarsson/gtk,grubersjoe/adwaita,jessevdk/gtk,alexlarsson/gtk,Sidnioulz/SandboxGtk,ahodesuka/gtk,jessevdk/gtk,davidgumberg/gtk,davidgumberg/gtk,jadahl/gtk,jigpu/gtk,jigpu/gtk,davidgumberg/gtk,chergert/gtk,Sidnioulz/SandboxGtk,alexlarsson/gtk,jadahl/gtk,chergert/gtk,jigpu/gtk,jigpu/gtk,jigpu/gtk,davidgumberg/gtk,jadahl/gtk,Lyude/gtk-,Lyude/gtk-,Lyude/gtk-,Lyude/gtk-,Adamovskiy/gtk,alexlarsson/gtk,Adamovskiy/gtk,jadahl/gtk,Sidnioulz/SandboxGtk,Adamovskiy/gtk,Sidnioulz/SandboxGtk,Lyude/gtk-,ahodesuka/gtk,Adamovskiy/gtk,jessevdk/gtk,ahodesuka/gtk,jadahl/gtk,Sidnioulz/SandboxGtk,chergert/gtk,davidgumberg/gtk,ahodesuka/gtk,grubersjoe/adwaita,grubersjoe/adwaita,alexlarsson/gtk,chergert/gtk,jigpu/gtk,alexlarsson/gtk,alexlarsson/gtk,grubersjoe/adwaita,jigpu/gtk,grubersjoe/adwaita,jadahl/gtk,jessevdk/gtk,chergert/gtk,Lyude/gtk-,ahodesuka/gtk,davidgumberg/gtk,jessevdk/gtk,ahodesuka/gtk,chergert/gtk,jigpu/gtk,chergert/gtk,davidgumberg/gtk,Adamovskiy/gtk