fix an abort when undoing a remove, but create a memory leak for that :/
[booh] / lib / booh /
drwxr-xr-x   ..
-rw-r--r-- 11732 GtkAutoTable.rb
-rw-r--r-- 2259 UndoHandler.rb
-rw-r--r-- 19125 booh-lib.rb
-rw-r--r-- 15408 html-merges.rb
-rw-r--r-- 611 pre-setup.rb