added some new css classes to delhi site panel

reference -> code4aap/drupal-aap-campaign#128
changes label of conatct container in constiuency

reference -> code4aap/drupal-aap-campaign#128
Added contextual filter nid in view block

Added contextual filter nid in view block in Selected and shortlisted candiate block

 reference -> code4aap/drupal-aap-campaign#128