restrict length of names in Pointers

Someone created http://grouppatternlanguage.org/wagn/Setting_Intention -- and got an Application error when trying to view it. Hoptoad said ArgumentError: key too long and the text matched what was in +visual (a Pointer), a very long piece of text. I used card/edit to split/shorten that, and now it works.

I started to file a ticket by this name, but when i created a test http://test.dwagn.org/wagn/card_including_insanely_long_Pointer it works, so not really sure what's up.