Bug 64874 [Themes] [Preferences] Colors and Fonts preference page: Doubleclick should edit
RC1 Double clicking an entry in the 'Colors and Fonts' preference page could open the edit dialog
bundles/org.eclipse.jface/src/org/eclipse/jface/preference/ColorSelector.java
updateColorImage();
    }
    /**
     * Set whether or not the button is enabled.
     * 
     * @param state
     *            the enabled state.
     */
    public void setEnabled(boolean state) {
        getButton().setEnabled(state);
    }
    /**
     * Update the image being displayed on the button using the current color
     * setting.
     */
    protected void updateColorImage() {
        Display display = fButton.getDisplay();
        GC gc = new GC(fImage);
        gc.setForeground(display.getSystemColor(SWT.COLOR_BLACK));
        gc.drawRectangle(0, 2, fExtent.x - 1, fExtent.y - 4);
        if (fColor != null)
            fColor.dispose();
        fColor = new Color(display, fColorValue);
        gc.setBackground(fColor);
        gc.fillRectangle(1, 3, fExtent.x - 2, fExtent.y - 5);
        gc.dispose();
        fButton.setImage(fImage);
    }
}