Added project settings allowing setup + editing task types.

- Attract added to Project Settings screen
- setting up project for Attract
- editing shot/asset task types

To do: add checks that the user is allowed to use Attract in the first
place.

src/scripts/tutti/00_utils.js

@@ -178,3 +178,23 @@ function setHeaderCellsWidth(tableHeaderRowOriginal, tableHeaderRowFixed) {
         return table_header.eq(i).width();
     });
 }
+
+/* Returns a more-or-less reasonable message given an error response object. */
+function xhrErrorResponseMessage(err) {
+    if (typeof err.responseJSON == 'undefined')
+        return err.statusText;
+
+    if (typeof err.responseJSON._error != 'undefined' && typeof err.responseJSON._error.message != 'undefined')
+        return err.responseJSON._error.message;
+
+    if (typeof err.responseJSON._message != 'undefined')
+        return err.responseJSON._message
+
+    return err.statusText;
+}
+
+function xhrErrorResponseElement(err, prefix) {
+    msg = xhrErrorResponseMessage(err);
+    return $('<span>')
+        .text(prefix + msg);
+}