Drafts system implemented

nonpacks/static/js/uploads.js

@@ -21,6 +21,7 @@
     function init(options) {
         const opts = options || {};
         const pending = opts.pending || [];
+        const draftUuid = opts.draftUuid || '';
         const csrf = getCookie('csrftoken');
         const csrfHeader = csrf ? { 'X-CSRFToken': csrf } : {};
 
@@ -112,6 +113,7 @@
             const fd = new FormData();
             fd.append('file', file);
             fd.append('kind', z.kind);
+            if (draftUuid) fd.append('draft_uuid', draftUuid);
 
             const xhr = new XMLHttpRequest();
             xhr.open('POST', '/api/uploads/');