Please describe the problem:
When expanding a node, the first column width gets unecessarily increased and so it shifts subsequent columns to the right possibly causing some of them to be unseen.

I made a byzanz recording[1][2] where you can see the bug in the listview of nautilus. In the recording:

1) I open a listview folder where the first two columns can be seen, the treeview adapts first column width to the widest element that in this case is the first item on the treeview.

2) Whenever I open a  subnode of a folder the first column width gets (unecessary) increased causing the second column to be shifted to the right till it's no longer seen.

3) During the recording I scroll up and down several times so you see that the widest element on the first column is always the same (the first item of the column) and so these increase-width-on-opening-subnode are not necessary because 
there's no item in the subnodes that could exceed the current-widest-element and therefore need an increased column width to fit it.
we don't need to make room for any element on the subnode 


[1] http://supertux.cenobioracing.com/archivos/treeview_bug_expand_width.gif (1.7 MB)

[2] http://supertux.cenobioracing.com/archivos/treeview_bug_expand_width2.gif (3.3 MB)



Steps to reproduce:



Actual results:


Expected results:


Does this happen every time?


Other information: