Drag & Drop not working (no Livequery)

[christopherdarling]

When you start silverstripe from a page that doesn't have any KickAssets fields included and then go to edit another page that does have a MultipleFileAttachmentField with the ManyManySortable extension enabled I get a javascript error; "Livequery is not a object". This is because the script manymanysortable.js is loading before livequery is loaded.

I'll submit a pull request shortly with a fix.