[gimp] themes: improve GimpColor{Notebook,Scales} spin-button style

[Ell <ell src gnome org>]

commit a5535dc9c92c3947ba94245f3c5c43cf16df03d9
Author: Ell <ell_se yahoo com>
Date:   Wed Jun 17 10:33:40 2020 +0300

    themes: improve GimpColor{Notebook,Scales} spin-button style

 themes/System/gimp.css | 13 ++++---------
 1 file changed, 4 insertions(+), 9 deletions(-)
---
diff --git a/themes/System/gimp.css b/themes/System/gimp.css
index 9acca7ba1a..8dd099b45e 100644
--- a/themes/System/gimp.css
+++ b/themes/System/gimp.css
@@ -29,18 +29,13 @@ GimpColorNotebook tab {
     padding: 0 0 0 0;
 }
 
-GimpColorNotebook spinbutton,
-GimpColorNotebook spinbutton entry,
-GimpColorScales spinbutton,
-GimpColorScales spinbutton entry {
+GimpDock GimpColorNotebook spinbutton,
+GimpDock GimpColorNotebook spinbutton entry,
+GimpDock GimpColorScales spinbutton,
+GimpDock GimpColorScales spinbutton entry {
     min-height: 0;
 }
 
-GimpColorNotebook spinbutton button,
-GimpColorScales spinbutton button {
-    padding: 0 0 0 0;
-}
-
 GimpColorSelection ColorselCmyk {
     padding: 2px 2px 2px 2px;
 }