Load all the tickets for the depending/blocking fields
    
    The ajax call had not been adjusted for the change in the pagination
    of the endpoints so it was returning only some of the tickets instead
    of all of them.
    This commit adjusts this. We may need to optimize this for large projects
    but this can be done in another change.
    
    Fixes https://pagure.io/pagure/issue/3939
    
    Signed-off-by: Pierre-Yves Chibon <pingou@pingoured.fr>