WebUI: Improve subordinate ids user workflow
    
    - add "Subordinate ID Statistics" page
    - add button for generating subid in "Subordinate ids" tab of user details page
    - allow to navigate directly to owner details from subordinate id page
    - adjust i18n strings
    
    Ticket: https://pagure.io/freeipa/issue/8361
    Signed-off-by: Serhii Tsymbaliuk <stsymbal@redhat.com>
    Reviewed-By: Francois Cami <fcami@redhat.com>
    Reviewed-By: Rob Crittenden <rcritten@redhat.com>
    Reviewed-By: Francois Cami <fcami@redhat.com>
    Reviewed-By: Rob Crittenden <rcritten@redhat.com>