[gnome-boxes/ellipsize-notification-message-label] notification: Limit Notification message from expanding out of the window

[Felipe Borges <felipeborges src gnome org>]

commit f9cff2756e722f6d0ea4c4dab2d44c66ad75ac66
Author: Felipe Borges <felipeborges gnome org>
Date:   Tue Jun 9 11:32:42 2020 +0200

    notification: Limit Notification message from expanding out of the window
    
    This is more evident for long messages such as
    "Source installer media '%s' no longer exists", where the path
    can make the label expand a lot.

 data/ui/notification.ui | 4 ++++
 1 file changed, 4 insertions(+)
---
diff --git a/data/ui/notification.ui b/data/ui/notification.ui
index f7ce0dac..66b4d019 100644
--- a/data/ui/notification.ui
+++ b/data/ui/notification.ui
@@ -21,12 +21,16 @@
         <child>
           <object class="GtkLabel" id="message_label">
             <property name="visible">True</property>
+            <property name="ellipsize">end</property>
+            <property name="lines">3</property>
+            <property name="wrap">True</property>
           </object>
         </child>
 
         <child>
           <object class="GtkButton" id="ok_button">
             <property name="halign">end</property>
+            <property name="valign">end</property>
 
             <child>
               <object class="GtkLabel" id="ok_button_label">