message: Fix LastChangedOn property on site area images
diff: @@ -278,10 +278,13 @@ export default class SiteAreaStorage {
  $addFields: {
  image: {
  $concat: [
  - `${Utils.buildRestServerURL()}/client/util/SiteAreaImage?ID=`,
  + `${Utils.buildRestServerURL()}/v1/util/site-areas/`,
  { $toString: '$_id' },
  - `&TenantID=${tenant.id}&LastChangedOn=`,
  - { $toString: '$lastChangedOn' }
  + '/image',
  + `?TenantID=${tenant.id}`,
  + {
  + $ifNull: [{ $concat: ['&LastChangedOn=', { $toString: '$lastChangedOn' }] }, ''] // Only concat 'lastChangedOn' if not null
  + }
  ]
  }
  }
  