Fix double auth in demo app

demo/src/dbp-check-in-place-select-demo-activity.js

demo/src/dbp-data-table-view-demo-activity.js

...dbp-knowledge-base-web-page-element-view-demo-activity.js

demo/src/dbp-matomo-demo-activity.js

demo/src/dbp-person-profile-demo-activity.js

demo/src/dbp-person-select-demo-activity.js

...eck-in-place-select/src/dbp-check-in-place-select-demo.js

packages/data-table-view/src/dbp-data-table-view-demo.js

...view/src/dbp-knowledge-base-web-page-element-view-demo.js

packages/matomo/src/dbp-matomo-demo.js

packages/person-profile/src/dbp-person-profile-demo.js

packages/person-select/src/dbp-person-select-demo.js