Make app settings name distinct

Ref https://github.com/nextcloud/server/issues/32350\#issuecomment-1191419585

Signed-off-by: Julius Härtl jus@bitgrid.net

The term "Settings" and "New" are used in various places and is not distinct enough. Accessibility requires more distinct names so that one can reach those places for example by getting a listing of links present in the page.