[meld] data/meld.css: Make the LinkMap stand out from the background

[Kai Willadsen <kaiw src gnome org>]

commit af1b9c8c21cbe57d85a9128076a669d7d90710ea
Author: Kai Willadsen <kai willadsen gmail com>
Date:   Thu Feb 11 07:32:00 2016 +1000

    data/meld.css: Make the LinkMap stand out from the background
    
    Some users have very reasonably complained that having the LinkMap have
    the same colour as the GtkSourceView makes it hard to see what kind of
    indentation level you're dealing with on right-hand panes. While we'd
    need to add backgrounds to the GtkSourceGutters as well to actually fix
    this, giving the Linkmap a background helps a little.

 data/meld.css |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/data/meld.css b/data/meld.css
index 77366d8..d9f61c0 100644
--- a/data/meld.css
+++ b/data/meld.css
@@ -14,7 +14,7 @@ link-map {
     border-width: 0 0 1px 0;
     border-style: solid;
     border-color: @borders;
-    background-color: @theme_base_color;
+    background-color: mix(@theme_bg_color, @theme_base_color, 0.5);
 }
 
 .meld-vc-console-pane {