MT#64037 PBXGroup Custom Announcements Bugfix

The custom announcements were not showing in
the CF menu under the PBXGroup section
because the action to load the announcements
was missing from the mounting hook.

Change-Id: I5813f2ce4471aa5a51ebc08ed3cdc08bde16b931
(cherry picked from commit acd9d84724)

src/pages/CscPagePbxGroupDetails.vue

@@ -481,6 +481,7 @@ export default {
         }
         this.selectGroup(this.id)
         await this.loadMappingsFull(this.id)
+        await this.loadAnnouncements()
     },
     beforeUnmount () {
         this.resetSelectedGroup()
@@ -513,7 +514,8 @@ export default {
         ]),
         ...mapActions('callForwarding', [
             'loadMappingsFull',
-            'createMapping'
+            'createMapping',
+            'loadAnnouncements'
         ]),
         ...mapMutations('pbxGroups', [
             'selectGroup',