Bad keys, subkeys, identities and signatures are tagged in red.
A secret key not owned by the user is shown in bold.
Application name is bold and bigger.
Popup background color is changed to floralwhite.
Certified user identities in keys can be revoked using the same popup
for certification.
Requires GnuPG 2.2.24 (not available in distro's repository, not fully
tested to date).
A private key should be editable to Unknown or Ultimate levels only.
A public key should be editable to all levels except Ultimate.
Undefined level is excluded for both public and private keys.
The public WTreeTableNode may list private keys if the user does not manage
these private keys. Inform of this state in the tool tip. The certification
trust level is excluded for any change.
It may be of interest to copy WTreeTableNode items text content. These
cannot be selected with the mouse for copy to clipboard. The text is
here shown read-only in an extended auto-replaced WLineEdit.
In-place editing with a popup if user is allowed in app config file.
User must of course manage at least a private key. User identities of
target key may be selectively chosen. Optionally, certification may be
exportable and non-revocable.
