GTK3: RegisteredColorPicker (e.g. for grid, guides color) does not show preview of current color

[su_v]

Follow-up report to bug #1016900:

The custom widget 'RegisteredColorPicker' used as button to open a color selector dialog (to set the color for various items e.g. in Document Properties and Preferences) doesn't render a preview of the current color (solid color swatch as used in the status bar style indicator).

Affects:
- Document Properties > Page | Guides | Grids
- Preferences > Tools (tool's own style)
- Preferences > Interface > Grids
and possibly other places I might have missed.

Reproduced with Inkscape 0.48+devel r11997 on OS X 10.7.4, using
- GTK+/X11 3.4.4, gtkmm 3.4.0, glib 2.32.4
- GTK+/Quartz 3.6.2, gtkmm 3.6.0, glib 2.24.3

[Alex Valavanis (valavanisalex)]

Should be fixed in lp:inkscape r12185. Seemed to be an issue with vertical fill property of the colour swatch widget not being set

[su_v (suv-lp)]

> status: Triaged → Fix Released

Cannot confirm this being fixed on OS X:
Buttons which preview a color setting (RGB, Alpha) are still rendered empty without preview (compared with GTK2 builds, same revision), e.g. document background color, grid and guides color in document properties, colors for default grid in preferences.

Tested with r12185 on OS X 10.7.4, using
- GTK+/X11 3.4.4, gtkmm 3.4.0, glib 2.32.4
- GTK+/Quartz 3.6.4, gtkmm 3.6.0, glib 2.24.3

GTK+ themes tested: Adwaita, Ubuntu Ambiance (Unico engine)

[su_v (suv-lp)]

> status: Fix Released → Incomplete

Needs verification whether this only affects OS X builds now (>= r12185).

[jazzynico (jazzynico)]

> Needs verification whether this only affects OS X builds now (>= r12185).

Also affects Debian testing, with revision 12189.

[Jabiertxof (jabiertxof)]

Fix on r.944a8da0e8. I put as fix released because I forget there is no release for GTK3 0.92.2, please update if is wrong.