[meld] data/meld.css: Reinstate some compatibility CSS for pre-3.20 GTK+

[Kai Willadsen <kaiw src gnome org>]

commit 941d1433475ebb18538ddf16581f3298aa295695
Author: Kai Willadsen <kai willadsen gmail com>
Date:   Sat Feb 27 07:23:20 2016 +1000

    data/meld.css: Reinstate some compatibility CSS for pre-3.20 GTK+

 data/meld.css |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/data/meld.css b/data/meld.css
index a9b518d..884c23f 100644
--- a/data/meld.css
+++ b/data/meld.css
@@ -17,6 +17,11 @@ link-map {
     background-color: @theme_bg_color;
 }
 
+/* Only for backwards-compatibility with pre-3.20 GTK+ */
+LinkMap {
+    background-color: @theme_bg_color;
+}
+
 .meld-vc-console-pane {
     border-width: 1px 0 0 0;
     border-style: solid;