TYPO3 Core

The new Extension Manager does not handle suggested extensions declared as 'suggests' constraint/dependency in ext_emconf.php.

Example with system extension saltedpasswords:

    'constraints' => array(
        'depends' => array(
            'typo3' => '6.0.0-0.0.0',
        ),
        'conflicts' => array(
            'kb_md5fepw' => '', 
            'newloginbox' => '', 
            'pt_feauthcryptpw' => '', 
            't3sec_saltedpw' => ''
        ),
        'suggests' => array(
            'rsaauth' => ''
        )
    ),

In the case of saltedpasswords the (system) extension rsaauth is suggested.

The "old" Extension Manager handles this dependency-type by
1) informing the user that there is another extension suggested by the currently installed extension
2) offering the user a button to install the suggested extension with just one click
-> see attached screenshot

The new Extension manager should handle it similiar.