[gnome-usage] css: Update background of highlighted row

[Felipe Borges <felipeborges src gnome org>]

commit 1435b60cf9b216c06dc65ea771b604d8eaf72c5f
Author: Petr Štětka <pstetka redhat com>
Date:   Thu Mar 15 18:17:38 2018 +0100

    css: Update background of highlighted row
    
    In dark theme (adwaita) bachground highlighted row in
    process-list-box is ugly. This commit change background of
    row for correct color in dark theme.

 data/interface/adwaita.css | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)
---
diff --git a/data/interface/adwaita.css b/data/interface/adwaita.css
index c5c38ed..a8528a7 100644
--- a/data/interface/adwaita.css
+++ b/data/interface/adwaita.css
@@ -10,13 +10,11 @@ list separator {
 }
 
 list row.max {
-    background: #fabbbb;
-    border: 1px solid #faa5a2;
+    background: alpha(@error_color, 0.3);
 }
 
 list row.max:hover {
-    background: #faa5a2;
-    border: 1px solid #faa5a2;
+    background: alpha(@error_color, 0.4);
 }
 
 list row.opened {