[gtk+] Adwaita: fix separator margin in popovers

[Lapo Calamandrei <lapo src gnome org>]

commit 473433c93d5e2c57e265ead893b96570569b5b17
Author: Hashem Nasarat <hashem riseup net>
Date:   Mon Jan 11 01:02:41 2016 -0500

    Adwaita: fix separator margin in popovers
    
    Commit 0b96b8a1 set margins via css, but accidentally changed the
    semantics of margins for separators in popovers so that any separator
    in a gtkpopover had a margin. This meant that the separators in
    GtkListBoxes in popovers also had a margin around their separators, and
    this is not what we want because it doesn't match separators in
    listboxes not in popovers.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=760427

 gtk/theme/Adwaita/_common.scss           |    2 +-
 gtk/theme/Adwaita/gtk-contained-dark.css |    4 ++--
 gtk/theme/Adwaita/gtk-contained.css      |    4 ++--
 3 files changed, 5 insertions(+), 5 deletions(-)
---
diff --git a/gtk/theme/Adwaita/_common.scss b/gtk/theme/Adwaita/_common.scss
index da5a151..d673285 100644
--- a/gtk/theme/Adwaita/_common.scss
+++ b/gtk/theme/Adwaita/_common.scss
@@ -1773,7 +1773,7 @@ popover.background {
     &.osd { @extend %osd; }
   }
 
-  separator { margin: 3px; }
+  list separator { margin: 0px; }
 }
 
 /*************
diff --git a/gtk/theme/Adwaita/gtk-contained-dark.css b/gtk/theme/Adwaita/gtk-contained-dark.css
index 25c31d7..7fe0b7a 100644
--- a/gtk/theme/Adwaita/gtk-contained-dark.css
+++ b/gtk/theme/Adwaita/gtk-contained-dark.css
@@ -2205,8 +2205,8 @@ popover.background {
     transition: none; }
   popover.background.touch-selection, popover.background.magnifier, .csd popover.background.touch-selection, 
.csd popover.background.magnifier {
     border: 1px solid rgba(255, 255, 255, 0.1); }
-  popover.background separator {
-    margin: 3px; }
+  popover.background list separator {
+    margin: 0px; }
 
 /*************
  * Notebooks *
diff --git a/gtk/theme/Adwaita/gtk-contained.css b/gtk/theme/Adwaita/gtk-contained.css
index 392e348..f1f6e62 100644
--- a/gtk/theme/Adwaita/gtk-contained.css
+++ b/gtk/theme/Adwaita/gtk-contained.css
@@ -2215,8 +2215,8 @@ popover.background {
     transition: none; }
   popover.background.touch-selection, popover.background.magnifier, .csd popover.background.touch-selection, 
.csd popover.background.magnifier {
     border: 1px solid rgba(255, 255, 255, 0.1); }
-  popover.background separator {
-    margin: 3px; }
+  popover.background list separator {
+    margin: 0px; }
 
 /*************
  * Notebooks *