Shorter Global Discovery label

gui/assets/lang/lang-en.json

@@ -49,7 +49,6 @@
    "Generate": "Generate",
    "Global Discovery": "Global Discovery",
    "Global Discovery Server": "Global Discovery Server",
-   "Global Discovery Servers": "Global Discovery Servers",
    "Global State": "Global State",
    "Idle": "Idle",
    "Ignore Patterns": "Ignore Patterns",

gui/index.html

@@ -201,7 +201,7 @@
                     <td class="text-right">{{system.cpuPercent | alwaysNumber | natural:1}}%</td>
                   </tr>
                   <tr ng-if="system.extAnnounceOK != undefined && announceServersTotal > 0">
-                    <th><span class="glyphicon glyphicon-bullhorn"></span>&emsp;<span translate>Global Discovery Servers</span></th>
+                    <th><span class="glyphicon glyphicon-bullhorn"></span>&emsp;<span translate>Global Discovery</span></th>
                     <td class="text-right">
                       <span ng-if="announceServersFailed.length == 0" class="data text-success">
                         <span>OK</span>