Resolves: tdf#141765 set 'color' GtkToolbar to small-button size

so its height is as small as possible so it won't force the surrounding
toolbar's height to stretch to fit it in

Change-Id: Ibfbcfb551cdd82df05faf382d8cb8fcaa142ec14
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/114406
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
diff --git a/svx/uiconfig/ui/fillctrlbox.ui b/svx/uiconfig/ui/fillctrlbox.ui
index 996f9bb..0eece44 100644
--- a/svx/uiconfig/ui/fillctrlbox.ui
+++ b/svx/uiconfig/ui/fillctrlbox.ui
@@ -63,6 +63,9 @@
                <property name="homogeneous">False</property>
              </packing>
            </child>
            <style>
              <class name="small-button"/>
            </style>
          </object>
          <packing>
            <property name="expand">False</property>