D11725: [RFC] Show signature status as a popup

[Chinmoy Ranjan Pradhan]

chinmoyr removed a dependency: D11723: Add FormFieldSignature to Okular 
namespace.

REPOSITORY
  R223 Okular

REVISION DETAIL
  https://phabricator.kde.org/D11725

To: chinmoyr, #okular
Cc: okular-devel, aacid, sander, ngraham