Revert last commit, it broke too many things.

Due to matlab stupidity, it doesn't have an undo functionality in its
input boxes (why?).  The work around involves unfocusing and re-focusing the 
textbox.  In the meantime, the original bug I tried to fix is still out there.


git-svn-id: https://groke.mcmaster.ca/svn/grad/colin/trunk/TableTool@8552 57e6efec-57d4-0310-aeb1-a6c144bb1a8b