* This indicates the view will manage whatever scrollbars are targeted
to it.
* Use _B_RESERVED7_ for this. It's been RESERVED since BeOS R5
(I guess it was probably something on some older BeOS version?)
and we don't really care about BeOS R4 ABI compatibility, so
that should be fine.
* Update BScrollView to not touch BScrollBar range/proportion
when the target view has this set.
* Update BListView to set this flag, always.
Fixes#14871.
Change-Id: I17027f3b63ef28da1e735c5393593496c415dce3
Reviewed-on: https://review.haiku-os.org/c/998
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>