[gnome-software] updates page: Add a translator comment

[Kalev Lember <klember src gnome org>]

commit cf4496dd71bb9b219cbff5e7ac363a07bfbd5207
Author: Kalev Lember <klember redhat com>
Date:   Thu Oct 18 09:49:49 2018 +0200

    updates page: Add a translator comment
    
    Fixes: https://gitlab.gnome.org/GNOME/gnome-software/issues/428

 src/gs-updates-page.ui | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/gs-updates-page.ui b/src/gs-updates-page.ui
index 45e9a65f..64bbe68f 100644
--- a/src/gs-updates-page.ui
+++ b/src/gs-updates-page.ui
@@ -174,7 +174,7 @@
                     <child>
                       <object class="GtkLabel" id="label10">
                         <property name="visible">True</property>
-                        <property name="label" translatable="yes">Software is up to date</property>
+                        <property name="label" translatable="yes" comments="TRANSLATORS: This means all 
software (plural) installed on this system is up to date.">Software is up to date</property>
                         <attributes>
                           <attribute name="scale" value="1.4"/>
                         </attributes>