dev : #167576 : rename header column waiting_count
requested to merge dev#167576_mel_abonnes_portail_mel_validation_depuis_l_admin_bokeh into lille_dev
- link to open new page on waitings
- add delete user in waitings
- add validate user in waitings
- add link validate all
- add confirm message for delete action
- not display in popup and have button to redirect
- add color blue for link in borrowers libraries waitings