Selection bar in tracker list doesn't update when list changes

[niente0]

As said in the title, selection bar in tracker list doesn't update when list changes.

I usually add a lot of trackers, then I order the list by status, to remove trackers that don't work. If I select a group of trackers to remove and meanwhile the list changes (because uTorrent is still checking if trackers are working), the selection doesn't retain the trackers I selected but the position where I selected them.

So when I press DEL to delete trackers, very often I remove WORKING trackers because the list updated itself after my selection!

Please fix it! Thank you