Fix: Don't pass gmp object to TagDialog onSave handle

The gmp object is not part of saving a tag. Therefore it shouldn't be
put into the state of the TagDialog and passed to the onSave handler.

src/web/pages/tags/dialog.jsx

@@ -193,6 +193,7 @@ class TagDialog extends React.Component {
  resource_types = [],
  title = _('New Tag'),
  value = '',
+ gmp,
  onClose,
  onSave,
  ...options