[gimp] themes: draw a wider border around GimpFgBgColor's active color

[Michael Natterer <mitch src gnome org>]

commit 231b82a7fe9db1714f15826cbb31466f41cfd0ac
Author: Michael Natterer <mitch gimp org>
Date:   Thu Oct 25 12:02:41 2018 +0200

    themes: draw a wider border around GimpFgBgColor's active color
    
    Not quite optimal but at least some indication of the active color,
    or at least of the fact that there are two different states.

 themes/System/gimp.css | 4 ++++
 1 file changed, 4 insertions(+)
---
diff --git a/themes/System/gimp.css b/themes/System/gimp.css
index b55e12eefe..158908520d 100644
--- a/themes/System/gimp.css
+++ b/themes/System/gimp.css
@@ -57,6 +57,10 @@ tab GimpFgBgView {
     padding: 6px 6px 6px 6px;
 }
 
+GimpFgBgEditor:active {
+    border-width: 2px 2px 2px 2px;
+}
+
 GimpDock {
     font-size: smaller;
 }