Batch validation/correction of fields

[dom]

Whichever recent release tightened up validation of various fields should really have offered to batch convert existing data. A contributor says:

After editing "Ha! Ha!" to add the 'Closed' category, I get the following error:

"Your input was invalid:

    * os_x must be integer, was: 451023.383
    * os_y must be integer, was: 206127.792

Please correct your input data and try again."

After removing the decimal part, the page saves successfully - but
would it be worth your changing every page accordingly?

It's probably not worth trying to add this to the official distribution now, but we could still try and tidy up oxford.

[dom]

The general bug about this is #259