textview: Unset bubble timeout ID right after requesting the clipboard
textview: Unset bubble timeout ID right after requesting the clipboard

The timeout ID used to be unset after we got the targets from the
clipboard, but there's still a moment between the clipboard request and
the GDK_SELECTION_NOTIFY event that the ID points to an already gone
timeout.

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