[gtk+] Adwaita: add .content-view:hover styling.

[Lapo Calamandrei <lapo src gnome org>]

commit b931852e1bda02bbb502a7f29176251b631220cd
Author: Lapo Calamandrei <calamandrei gmail com>
Date:   Wed Sep 2 17:23:22 2015 +0200

    Adwaita: add .content-view:hover styling.
    
    Just to make thumbs in various app hilight on hover.

 gtk/theme/Adwaita/_common.scss           |    2 +-
 gtk/theme/Adwaita/gtk-contained-dark.css |    2 ++
 gtk/theme/Adwaita/gtk-contained.css      |    2 ++
 3 files changed, 5 insertions(+), 1 deletions(-)
---
diff --git a/gtk/theme/Adwaita/_common.scss b/gtk/theme/Adwaita/_common.scss
index eb7e414..63f9226 100644
--- a/gtk/theme/Adwaita/_common.scss
+++ b/gtk/theme/Adwaita/_common.scss
@@ -2161,9 +2161,9 @@ GtkSwitch {
 }
 
 //content view (grid/list)
-
 .content-view {
   background-color: darken($bg_color,7%);
+  &:hover { -gtk-image-effect: highlight; }
   &:backdrop { background-color: darken($bg_color,7%); }
 }
 
diff --git a/gtk/theme/Adwaita/gtk-contained-dark.css b/gtk/theme/Adwaita/gtk-contained-dark.css
index e6685db..026be9d 100644
--- a/gtk/theme/Adwaita/gtk-contained-dark.css
+++ b/gtk/theme/Adwaita/gtk-contained-dark.css
@@ -2823,6 +2823,8 @@ GtkSwitch {
 
 .content-view {
   background-color: #282c2c; }
+  .content-view:hover {
+    -gtk-image-effect: highlight; }
   .content-view:backdrop {
     background-color: #282c2c; }
 
diff --git a/gtk/theme/Adwaita/gtk-contained.css b/gtk/theme/Adwaita/gtk-contained.css
index 86ebc21..be82280 100644
--- a/gtk/theme/Adwaita/gtk-contained.css
+++ b/gtk/theme/Adwaita/gtk-contained.css
@@ -2985,6 +2985,8 @@ GtkSwitch {
 
 .content-view {
   background-color: #dbdbdb; }
+  .content-view:hover {
+    -gtk-image-effect: highlight; }
   .content-view:backdrop {
     background-color: #dbdbdb; }