Drop concatenated title of remove dialog
    
    As for now the default title of remove dialogs is set to
    'Remove ${entity}', where 'entity' is also translatable text.
    This construction is used via method 'create_remove_dialog'
    of Search facet for the all association 'Delete' actions of
    entities.
    
    The such concatenation leads to a bad quality translation and
    should be changed to an entire sentence.
    
    From now a mentioned title is taken from a spec and should be
    specified explicitly.
    
    Fixes: https://pagure.io/freeipa/issue/7699
    Reviewed-By: Serhii Tsymbaliuk <stsymbal@redhat.com>
    Reviewed-By: Christian Heimes <cheimes@redhat.com>