D21092: Okular Annotation: use the new signal-slot connect syntax

[Albert Astals Cid]

aacid accepted this revision.
This revision is now accepted and ready to land.

REPOSITORY
  R223 Okular

REVISION DETAIL
  https://phabricator.kde.org/D21092

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