Revert "Added support to --imagelist on tree. Thanks to Joshua Nathaniel Pritikin <jpritikin@pobox.com> now the first column can have an image."

This reverts commit c17eff58.

This reverts commit 8777940f.

This reverts commit 746e60ce.

This doesn't belong to gnome-3-4 branch. Ditto for other reverts.

Added support to --imagelist on tree. Thanks to Joshua Nathaniel Pritikin <jpritikin@pobox.com> now the first column can have an image.

Be a bit more user friendly, and instead of crashing, add a default
column name if the user forgot to use --column-values with a --forms list.

https://bugzilla.gnome.org/show_bug.cgi?id=676406

Also manually unbreak the string freeze break.

This reverts commit 589ffee2.