This will be in this week's releases. Also, the TP-related floaters (world map, search, landmark floaters and teleport history) will be all affected by the same setting, and when the latter is set to close floaters, they are closed only on a successful TP (not like now, as soon as you hit the TP button).
EDIT: also, I made it so that the landmark preview floaters are not closed unless they had their "Teleport" or "Show on Map" buttons pressed and that they are not minimized at the moment the TP succeeds: this is so that you can have/keep a few such preview floaters open while exploring and only having those visited and that you don't want to keep around (as minimized floaters) auto-closed on TP.