MT#63384 Fix Group Details page crash upon refresh

Fixed an issue where the component tried to access the `id` property
of `this.groupSelected` when it was undefined. This happened because
the state gets cleared on refresh, and the component didn't have a
check to reload the necessary resources.

- Added check to ensure resources are reloaded if state is cleared
- Prevent accessing `id` of undefined in the component

Change-Id: Ib6b669df87d255cf174254b32fa1c451d0901f73
(cherry picked from commit 4e72e67697)

src/pages/CscPagePbxGroupDetails.vue

@@ -386,7 +386,8 @@ export default {
             'isGroupLoading',
             'getHuntCancelModeOptions',
             'getAnnouncementCfu',
-            'getAnnouncementCallSetup'
+            'getAnnouncementCallSetup',
+            'isGroupMapByIdEmpty'
         ]),
         ...mapGetters('callForwarding', [
             'groups'
@@ -466,7 +467,10 @@ export default {
             }
         }
     },
-    async mounted  () {
+    async mounted () {
+        if (this.isGroupMapByIdEmpty) {
+            await this.loadGroupListItems()
+        }
         this.selectGroup(this.id)
         await this.loadMappingsFull(this.id)
     },
@@ -493,7 +497,8 @@ export default {
             'setGroupNumbers',
             'setGroupSoundSet',
             'setAnnouncementCallSetup',
-            'setAnnouncementCfu'
+            'setAnnouncementCfu',
+            'loadGroupListItems'
         ]),
         ...mapActions('pbxCallQueues', [
             'jumpToCallQueue'

src/store/pbx-groups.js

@@ -52,6 +52,9 @@ export default {
                 getters.isGroupRemoving || getters.isGroupUpdating
             return !getters.isGroupListEmpty && requesting && state.groupListLastPage > 1
         },
+        isGroupMapByIdEmpty (state) {
+            return Object.keys(state.groupMapById).length === 0
+        },
         isGroupAddFormDisabled (state) {
             return state.groupCreationState === CreationState.initiated ||
                 state.groupCreationState === CreationState.created