D21364: Indicate annotation color in annotation list

[Jan Gerrit Marker]

jangmarker added a reviewer: Okular.

REPOSITORY
  R223 Okular

REVISION DETAIL
  https://phabricator.kde.org/D21364

To: jangmarker, #okular
Cc: okular-devel, joaonetto, tfella, ngraham, darcyshen, aacid