Added missing EN translations to maintenance.ts

Added missing translations

application/src/translations/en/maintenance.ts

@@ -66,5 +66,16 @@ export const maintenanceTranslations: MaintenanceTranslations = {
   noMaintenanceWindows: 'There are no maintenance windows for this period. Create one by clicking the "Create Maintenance" button.',
   maintenanceCreatedSuccess: 'Maintenance window created successfully',
   editMaintenanceWindow: 'Edit Maintenance',
-  editMaintenanceDesc: '',
+  editMaintenanceDesc: 'Edit maintenance details',
+  priorityDescription: 'Select maintenance priority',
+  statusDescription: 'Select maintenance status',
+  impactLevel: 'Impact Level',
+  impactLevelDescription: 'Select impact level',
+  selectAssignedUsers: 'Select Assigned Users',
+  assignedPersonnelDescription: 'Currently assigned users',
+  mutedNotifications: 'Notifications disabled',
+  notificationsAreMuted: 'Notifications are currently muted for this maintenance',
+  selectNotificationChannel: 'Add a notification channel', 
+  enableNotificationsFirst: 'Enable notifications first to select channel',
+  updateMaintenance: 'Update Maintenance',
 };