Code review comment for lp://qastaging/~desrt/notify-osd/GNOME_BACKGROUND_REPRESENTATIVE_COLORS

The way a bubble is initialized and defaults_refresh_bg_color_property() goes about updating the "bubble-bg-color", it'll fall back to the typical dark grey color, should the X-property "_GNOME_BACKGROUND_REPRESENTATIVE_COLORS" not be available. I tested that by defaults_refresh_bg_color_property() returning early not touching "bubble-bg-color" at all.