[sysprof] libsysprof-ui: soften the shadows a bit

[Christian Hergert <chergert src gnome org>]

commit 949c75e0f4380d05d4a441048dcf7725718d6394
Author: Christian Hergert <chergert redhat com>
Date:   Thu Aug 1 00:48:25 2019 -0700

    libsysprof-ui: soften the shadows a bit

 src/libsysprof-ui/css/SysprofDisplay-shared.css | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/libsysprof-ui/css/SysprofDisplay-shared.css b/src/libsysprof-ui/css/SysprofDisplay-shared.css
index d7d27f1..7b75023 100644
--- a/src/libsysprof-ui/css/SysprofDisplay-shared.css
+++ b/src/libsysprof-ui/css/SysprofDisplay-shared.css
@@ -26,7 +26,7 @@ SysprofVisualizersFrame box.horizontal.inline-toolbar {
 
 SysprofVisualizersFrame viewport.visualizers {
   border-right: 1px solid @borders;
-  box-shadow: 1px 1px 10px @borders;
+  box-shadow: 1px 1px 3px alpha(@borders, 0.5);
   }
 
 SysprofVisualizersFrame scrollbar.horizontal {