Command Stack scrolls up to the first edit view when hitting "Undo" if scrollbar is present

[rickmastfan67]

Steps to reproduce:

1. Download an area to edit (doesn't matter what size as long as there are several things that can be edited)
2. Since this is just a test and no data is going to be uploaded, move around several nodes/ways so that the Command Stack displays the scroll bar.
3. Once the scroll bar in the Command Stack is of a decent length (do about 25 node/way moves first), hit "Ctrl+Z" (or the "Undo" button, doesn't matter, happens either way) to undo just the last edit.

What happens: The Command Stack scrolls up by itself to show you your first edits during your current JOSM session.

What should happen: The Command Stack shouldn't scroll up unless you do enough "Ctrl+Z's" (or hit the "Undo" button enough times) to make it scroll up to show you the last edit you've "undone".

Repository Root: http://josm.openstreetmap.de/svn
Build-Date: 2011-06-27 01:31:44
Last Changed Author: stoecker
Revision: 4177
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
URL: http://josm.openstreetmap.de/svn/trunk
Last Changed Date: 2011-06-26 17:45:48 +0200 (Sun, 26 Jun 2011)
Last Changed Rev: 4177

Identification: JOSM/1.5 (4177 en)
Memory Usage: 154 MB / 3640 MB (120 MB allocated, but free)
Java version: 1.6.0_26, Sun Microsystems Inc., Java HotSpot(TM) 64-Bit Server VM
Operating system: Windows 7

[bastiK]

In [4395/josm]:

fixed #6514 - Command Stack scrolls up to the first edit view when hitting Undo if scrollbar is present