Show no-notification message in the bottom label of message center

ui/strings/ui_strings.grd

 <?xml version="1.0" encoding="UTF-8"?>
 
 <!-- This file contains definitions of resources that will be translated for
 each locale. Specifically, these are UI strings that are used by app/ that
 need to be translated for each locale.-->
 
 <grit base_dir="." latest_public_release="0" current_release="1"
       source_lang_id="en" enc_check="möl">
   <outputs>
     <!-- TODO add each of your output files.  Modify the three below, and add
@@ skipping 615 matching lines @@
         <message name="IDS_MESSAGE_CENTER_QUIET_MODE_BUTTON_TOOLTIP" desc="The tooltip text for the do not disturb button.">
           Do not disturb
         </message>
       </if>
       <if expr="use_titlecase">
         <message name="IDS_MESSAGE_CENTER_QUIET_MODE_BUTTON_TOOLTIP" desc="In Title Case: The tooltip text for the do not disturb button.">
           Do Not Disturb
         </message>
       </if>
       <message name="IDS_MESSAGE_CENTER_NO_MESSAGES" desc="The message displayed in the message center when there are no notifications.">
-        Nothing to see here, move along.
+        You have no notifications
       </message>
       <message name="IDS_MESSAGE_CENTER_QUIET_MODE" desc="The button label for do not disturb mode.">
         Do not disturb
       </message>
       <message name="IDS_MESSAGE_CENTER_QUIET_MODE_1HOUR" desc="The button label to enter do not disturb mode in one hour.">
         Do not disturb for one hour
       </message>
       <message name="IDS_MESSAGE_CENTER_QUIET_MODE_1DAY" desc="The button label to enter do not disturb mode in one day.">
         Do not disturb for one day
       </message>
@@ skipping 42 matching lines @@
       </message>
       <message name="IDS_APP_LIST_SPEECH_HINT_TEXT" desc="The text label in the speech recognition UI to ask the user to speak the search query">
         Speak now
       </message>
       <message name="IDS_APP_LIST_SPEECH_NETWORK_ERROR_HINT_TEXT" desc="The text label in the speech recognition UI to show the speech recognition can't start because of network error.">
         No internet connection
       </message>
     </messages>
   </release>
 </grit>