D18396: Fix ToC icon, and remove unnecessary dependency on KDeclarative

[Albert Astals Cid]

aacid added a subscriber: mart.

REPOSITORY
  R223 Okular

REVISION DETAIL
  https://phabricator.kde.org/D18396

To: vkrause
Cc: mart, okular-devel, tfella, ngraham, darcyshen, aacid