[FileTypes] BListView update several times

[diver]

If you delete some type from FileTypes you will notice BlistView updates 3-4 times which causes high cpu usage. I think one update should be enough.

[diver]

Also on item remove next item should be selected and binding delete key to remove button would be useful too.

[axeld]

You'd think, yes, but I refuse that feature request: you'll only rarely delete MIME types, there is no reason to ease navigation doing so, IMO.

But I'll look into the update thing :)

[axeld]

This was obviously caused by the focus change due to the "Do you really want to remove this type?" alert and the bug in BListView::WindowActivated() which has been fixed in hrev17804.