Caused by #143974.
Allow `use_sequence_detection` and `use_placeholders` to be
automatically drawn by `sequencer_add_draw_check_fn` when applicable
instead of unconditionally adding it to the UI.
Ordering of these two can be preserved by swapping the original
`RNA_def_boolean` calls.
Pull Request: https://projects.blender.org/blender/blender/pulls/145431
4bdcc7643b