communities: delete modal dialog fix
communities: delete modal dialog fix

* Fixes issues that caused the modal dialog for deleting a community
  not to display.

Co-authored-by: Adrian Pawel Baran <3f0d95b8f073876984c6beaffa367600a8350ef3@cern.ch>
Signed-off-by: Lars Holm Nielsen <7eaffca9f7cd98839b5821d0d23e09ff764b82cd@cern.ch>

inveniosoftware/invenio-communities,inveniosoftware/invenio-communities,inveniosoftware/invenio-communities,inveniosoftware/invenio-communities