[IMPROVE] Administration Pages root rewritten (#17209)

app/apps/client/orchestrator.js

app/apps/client/routes.js

app/authorization/client/route.js

app/authorization/client/startup.js

app/channel-settings/client/views/Multiselect.js

app/chatpal-search/client/route.js

app/cloud/client/index.js

app/custom-sounds/client/admin/route.js

app/custom-sounds/client/admin/startup.js

app/emoji-custom/client/admin/route.js

app/emoji-custom/client/admin/startup.js

app/federation/client/admin/dashboard.js

app/importer/client/index.js

app/integrations/client/route.js

app/integrations/client/startup.js

app/invites/client/admin/route.js

app/invites/client/admin/startup.js

app/logger/client/viewLogs.js

app/mail-messages/client/router.js

app/mail-messages/client/startup.js