[polari] ui: Highlight header on hover if sensitive

[Florian Müllner <fmuellner src gnome org>]

commit 010fd09b8e2e918ffb62dd073675768da01ac490
Author: Cody Welsh <codyw protonmail com>
Date:   Tue Oct 13 18:58:09 2015 -0700

    ui: Highlight header on hover if sensitive
    
    In case of account errors, room headers become clickable, but we currently
    don't convey that to the user. So highlight sensitive headers on hovers
    to make this more obvious.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=755158

 data/resources/room-list-header.ui |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/data/resources/room-list-header.ui b/data/resources/room-list-header.ui
index 82b89c6..3e5a3fa 100644
--- a/data/resources/room-list-header.ui
+++ b/data/resources/room-list-header.ui
@@ -9,6 +9,8 @@
     <property name="visible">True</property>
     <style>
       <class name="room-list-header"/>
+      <class name="list-row" />
+      <class name="activatable" />
     </style>
     <child>
       <object class="GtkBox">