Context

ce-test-webapps on release/6.2 still bundle some apps in old "legacy" and in new version.

test-fwk compoments like MultiFieldComponent, previewapp etc. have been developped for new apps, some functions fail on legacy-apps.

Currently it is also not possible to "hide" the legacy apps via appLauncherLayout/hiddenApps (maybe due to ADMINCTR-213).

Findbar#openApp as for now always opens the legacy apps used in p13n-context (preview, personas, segments). This breaks couple of self-tests and will also break functional tests in dx-core.

SO - we need to disable the legacy apps preview, personas, segments at it has been done on master already -> see commit