[gnome-control-center] panels: Add X-GNOME-UsesNotifications to several desktop files

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit c07b35731112553665519090b7c92575532215b4
Author: Philip Withnall <withnall endlessm com>
Date:   Thu Nov 1 17:22:21 2018 +0000

    panels: Add X-GNOME-UsesNotifications to several desktop files
    
    gnome-settings-daemon emits notifications related to these four control
    panels. If we add X-GNOME-UsesNotifications to their desktop files, the
    user will be able to control the notifications.
    
    https://wiki.gnome.org/Initiatives/GnomeGoals/NotificationSource
    
    Signed-off-by: Philip Withnall <withnall endlessm com>

 panels/color/gnome-color-panel.desktop.in.in       | 2 ++
 panels/datetime/gnome-datetime-panel.desktop.in.in | 2 ++
 panels/power/gnome-power-panel.desktop.in.in       | 2 ++
 panels/printers/gnome-printers-panel.desktop.in.in | 2 ++
 4 files changed, 8 insertions(+)
---
diff --git a/panels/color/gnome-color-panel.desktop.in.in b/panels/color/gnome-color-panel.desktop.in.in
index 30656828a..947346f0a 100644
--- a/panels/color/gnome-color-panel.desktop.in.in
+++ b/panels/color/gnome-color-panel.desktop.in.in
@@ -16,3 +16,5 @@ X-GNOME-Bugzilla-Component=color
 X-GNOME-Bugzilla-Version=@VERSION@
 # Translators: Search terms to find the Color panel. Do NOT translate or localize the semicolons! The list 
MUST also end with a semicolon!
 Keywords=Color;ICC;Profile;Calibrate;Printer;Display;
+# Notifications are emitted by gnome-settings-daemon
+X-GNOME-UsesNotifications=true
\ No newline at end of file
diff --git a/panels/datetime/gnome-datetime-panel.desktop.in.in 
b/panels/datetime/gnome-datetime-panel.desktop.in.in
index f7242f1ae..307a99f94 100644
--- a/panels/datetime/gnome-datetime-panel.desktop.in.in
+++ b/panels/datetime/gnome-datetime-panel.desktop.in.in
@@ -12,3 +12,5 @@ Categories=GNOME;GTK;Settings;X-GNOME-Settings-Panel;X-GNOME-DetailsSettings;
 OnlyShowIn=GNOME;
 # Translators: Search terms to find the Date and Time panel. Do NOT translate or localize the semicolons! 
The list MUST also end with a semicolon!
 Keywords=Clock;Timezone;Location;
+# Notifications are emitted by gnome-settings-daemon
+X-GNOME-UsesNotifications=true
\ No newline at end of file
diff --git a/panels/power/gnome-power-panel.desktop.in.in b/panels/power/gnome-power-panel.desktop.in.in
index 59ff8ab94..84a1634a7 100644
--- a/panels/power/gnome-power-panel.desktop.in.in
+++ b/panels/power/gnome-power-panel.desktop.in.in
@@ -16,3 +16,5 @@ X-GNOME-Bugzilla-Component=power
 X-GNOME-Bugzilla-Version=@VERSION@
 # Translators: Search terms to find the Power panel. Do NOT translate or localize the semicolons! The list 
MUST also end with a semicolon!
 Keywords=Power;Sleep;Suspend;Hibernate;Battery;Brightness;Dim;Blank;Monitor;DPMS;Idle;
+# Notifications are emitted by gnome-settings-daemon
+X-GNOME-UsesNotifications=true
\ No newline at end of file
diff --git a/panels/printers/gnome-printers-panel.desktop.in.in 
b/panels/printers/gnome-printers-panel.desktop.in.in
index ac93dcae9..96ed1d288 100644
--- a/panels/printers/gnome-printers-panel.desktop.in.in
+++ b/panels/printers/gnome-printers-panel.desktop.in.in
@@ -13,3 +13,5 @@ Categories=GNOME;GTK;Settings;HardwareSettings;X-GNOME-Settings-Panel;X-GNOME-De
 OnlyShowIn=GNOME;Unity;
 # Translators: Search terms to find the Printers panel. Do NOT translate or localize the semicolons! The 
list MUST also end with a semicolon!
 Keywords=Printer;Queue;Print;Paper;Ink;Toner;
+# Notifications are emitted by gnome-settings-daemon
+X-GNOME-UsesNotifications=true
\ No newline at end of file