when set, prevents any old mouse moved message discarding.
* BWindow::DispatchMessage(B_MOUSE_MOVED) checks the event time of the
message and discards too old events, but only if there is another event
in the queue and the view does not specify B_FULL_POINTER_HISTORY.
* BView::GetMouse() ignores the checkHistory flag passed to the function
in case the event mask specifies B_NO_POINTER_HISTORY.
B_FULL_POINTER_HISTORY on the other hand prevents the dropping of old
messages.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@26341 a95241bf-73f2-0310-859d-f6bbb57e9c96
bb73c05fd7