[gnome-shell] extensions-app: Use `.content` class for lists

[Marge Bot <marge-bot src gnome org>]

commit 35b26229bcf319aa67a4d64a158ce55ce9e03473
Author: Romain Vigier <romain romainvigier fr>
Date:   Mon Oct 4 15:42:48 2021 +0200

    extensions-app: Use `.content` class for lists
    
    Since the `.content` class comes with its own separators, we
    don't need the property `use-separators` on the list.
    
    Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1997>

 subprojects/extensions-app/data/ui/extensions-window.ui | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)
---
diff --git a/subprojects/extensions-app/data/ui/extensions-window.ui 
b/subprojects/extensions-app/data/ui/extensions-window.ui
index 1a95f9acf6..e69726ba50 100644
--- a/subprojects/extensions-app/data/ui/extensions-window.ui
+++ b/subprojects/extensions-app/data/ui/extensions-window.ui
@@ -155,10 +155,9 @@
                             <child>
                               <object class="GtkListBox" id="userList">
                                 <property name="selection-mode">none</property>
-                                <property name="show-separators">True</property>
                                 <property name="margin-bottom">24</property>
                                 <style>
-                                  <class name="frame"/>
+                                  <class name="content"/>
                                 </style>
                               </object>
                             </child>
@@ -179,9 +178,8 @@
                             <child>
                               <object class="GtkListBox" id="systemList">
                                 <property name="selection-mode">none</property>
-                                <property name="show-separators">True</property>
                                 <style>
-                                  <class name="frame"/>
+                                  <class name="content"/>
                                 </style>
                               </object>
                             </child>