php/editevent.php: Make editevent show an "update" button instead of an  "add" button if editing an event.
php/editevent.php: Make editevent show an "update" button instead of an 
"add" button if editing an event.


git-svn-id: 5a113f46df058f8047e288f4f3e948d899353d9a@367 410355f2-c4ea-45de-a5b5-301721f902b9

mwcampbell/prs,mwcampbell/prs,mwcampbell/prs